SlideShare a Scribd company logo
A changing world
Satoshi Omura
Graduated from University of
Yamanashi
Fights incredibly horrible diseases
Roundworms
Roundworm infections
More common in poor countries
Sometimes no symptoms
Shortness of breath
Fever
Stomach pain
Diarrhea
Eggs can infect humans
Get onto food
Grow in the stomach
15 to 20 centimeters long!!
Pretty horrible
I’m not showing you …
… the REALLY bad pictures
Professor Omura helped many people
Treatments for infections
Avermectin
Very bad medical conditions
But science has limits
World population is exploding
Over 7 billion now
1 billion in 1800
370 million in 1350
Everyone should follow Japan
Great famine
Black Death
Starvation
Disease
Too many people
Growing too fast!
Starvation and disease
War
Migrants
• Iraq
• Syria
• Afghanistan
• Pakistan
• Bangladesh
• Eritrea
• Somalia
• Nigeria
• Sudan
London 2001
Huge protests against war in Iraq
London 2001
Our governments went to war, anyway
Why?
War is profitable
If people can make money, they’ll do it
American war veterans in 2012
Throwing medals away
Soldiers protesting the wars
Military-industry
They want money and power
They will do very bad things
They will start wars
Difficult to protest
It seems unpatriotic
But we keep starting wars
Government is unreliable
Military is unreliable
Corporations are unreliable
How about scientists?
Consider Malaria
What causes malaria?
These are the symptoms
Mosquitoes spread the disease
They transmit the disease
The mosquito bites humans
Symptoms develop in about 15 days
The malaria parasite
Malaria bites humans
Infects the human
Given back to the mosquito
The mosquito bites humans
Enter the human body
Infection enters the liver
May “sleep” in the liver up to 30 years
Different stages, different names
Infection travels to the blood
Transmitted TO the mosquito when
they bite infected patients
Malaria parasite has TWO hosts
For example, a human and a mosquito
About 200 million cases of malaria
every year
About a million deaths every year
Most cases in Africa
I lived in Sudan for one year
You need a net
Can we get rid of malaria?
Smallpox vaccine
Very successful
Smallpox has been eradicated
There’s no malaria vaccine
Malaria parasites are getting stronger
Anti-malaria drugs
Treatment for severe malaria
Here’s mefloquine
Quinine has been used since (at least)
the 17th century
Perhaps earlier
Quinine discovered in South America
Europeans were told about it in the
16th century
Quinine from a tree’s bark
Quinchona tree
Long history
Tonic water contains Quinine
Gin and tonic
British in India
G & T against Malaria
Artemisinin is used in Chinese
medicine
Derived from a plant
People were optimistic
Malaria parasites already resistant to
chloroquine
Resistant to this, too
Pailin in Cambodia
Pailin in Cambodia
Parasite is becoming more resistant
This is particularly worrying …
… because resistance to drugs …
… has started here before.
If resistance spreads to Africa …
… it’s really a problem
It’s a DISASTER
So what’s the solution?
Eradicate Malaria
Quickly
Do it now!
Discover a vaccine
Before the end of the class!
You’ll get a Nobel Prize
And an automatic A for this course
Maybe even A ➕
But don’t forget …
… there’s a LONG history
These parasites are tough
We’ve been thinking about this …
… for a LONG time
The parasite keeps winning
Still there’s hope
Guinea worm
Really horrible!
A long worm lives in the body!
People drink infected water
The worm grows in the stomach
Comes out of the skin!
Like this!
Really bad
Only dogs and humans get it
Gradually removed …
By winding it around a stick!
Up to one meter long
How can it be eradicated?
• No vaccine
• But we can kill the baby worms
• And water can be cleaned
• 3.5 million cases of Guinea worm in 1986!
• 126 cases in 2014
• That’s great!!
• Unless you are one of the 126 cases

More Related Content

Similar to Changing world

First Aide for 5th Grade
First Aide for 5th GradeFirst Aide for 5th Grade
First Aide for 5th Grade
MrsMendoza
 
Social studies 3
Social studies 3Social studies 3
Social studies 3
bkind2animals
 
Infection Of Pneumonia
Infection Of PneumoniaInfection Of Pneumonia
Infection Of Pneumonia
Janet Robinson
 
Food Therapy Part 1
Food Therapy Part 1Food Therapy Part 1
Food Therapy Part 1
Eugene Fung
 
Basic facts of tuberculosis and malaria [compatibility mode]
Basic facts of tuberculosis and malaria [compatibility mode]Basic facts of tuberculosis and malaria [compatibility mode]
Basic facts of tuberculosis and malaria [compatibility mode]
Emmanuel Olashore
 
01 How Do Bacteria Make You Sick.pptx
01 How Do Bacteria Make You Sick.pptx01 How Do Bacteria Make You Sick.pptx
01 How Do Bacteria Make You Sick.pptx
Kyzer Abcsleeboy
 
Germs In Sickness And In Health 1
Germs In Sickness And In Health 1Germs In Sickness And In Health 1
Germs In Sickness And In Health 1
Shalini Ratan
 
Health care prevention emiley reed
Health care prevention emiley reedHealth care prevention emiley reed
Health care prevention emiley reed
Emiley Reed
 
Infectious Diseases
Infectious DiseasesInfectious Diseases
Infectious Diseases
Andrew Joseph
 
HEALTH Q3 1st part.pptx
HEALTH Q3 1st part.pptxHEALTH Q3 1st part.pptx
HEALTH Q3 1st part.pptx
AntonyNecyhope
 
Communicable diseases
Communicable diseasesCommunicable diseases
Communicable diseases
LailaRizada3
 
Hira ppt
Hira pptHira ppt
Amoebiasis
AmoebiasisAmoebiasis
Amoebiasis
Himaja Devarakonda
 
Diseases and health problems
Diseases and health problemsDiseases and health problems
Diseases and health problems
Chris Haller
 
Cholera Masterpiece
Cholera MasterpieceCholera Masterpiece
Cholera Masterpiece
Chicago Public Schools
 
case study of a female with a parasitic disease Here is a Microbiolog.pdf
case study of a female with a parasitic disease Here is a Microbiolog.pdfcase study of a female with a parasitic disease Here is a Microbiolog.pdf
case study of a female with a parasitic disease Here is a Microbiolog.pdf
arihantplastictanksh
 
Amoebiaisis.
Amoebiaisis.Amoebiaisis.
Amoebiaisis.
GM Siddiqui
 
Salmonella
SalmonellaSalmonella
Salmonella
jugheadbar
 
BIOLOGY-GRADES-9-STUDENTS-UNIT-4.2P.pptx
BIOLOGY-GRADES-9-STUDENTS-UNIT-4.2P.pptxBIOLOGY-GRADES-9-STUDENTS-UNIT-4.2P.pptx
BIOLOGY-GRADES-9-STUDENTS-UNIT-4.2P.pptx
Kedir Mohammed
 

Similar to Changing world (19)

First Aide for 5th Grade
First Aide for 5th GradeFirst Aide for 5th Grade
First Aide for 5th Grade
 
Social studies 3
Social studies 3Social studies 3
Social studies 3
 
Infection Of Pneumonia
Infection Of PneumoniaInfection Of Pneumonia
Infection Of Pneumonia
 
Food Therapy Part 1
Food Therapy Part 1Food Therapy Part 1
Food Therapy Part 1
 
Basic facts of tuberculosis and malaria [compatibility mode]
Basic facts of tuberculosis and malaria [compatibility mode]Basic facts of tuberculosis and malaria [compatibility mode]
Basic facts of tuberculosis and malaria [compatibility mode]
 
01 How Do Bacteria Make You Sick.pptx
01 How Do Bacteria Make You Sick.pptx01 How Do Bacteria Make You Sick.pptx
01 How Do Bacteria Make You Sick.pptx
 
Germs In Sickness And In Health 1
Germs In Sickness And In Health 1Germs In Sickness And In Health 1
Germs In Sickness And In Health 1
 
Health care prevention emiley reed
Health care prevention emiley reedHealth care prevention emiley reed
Health care prevention emiley reed
 
Infectious Diseases
Infectious DiseasesInfectious Diseases
Infectious Diseases
 
HEALTH Q3 1st part.pptx
HEALTH Q3 1st part.pptxHEALTH Q3 1st part.pptx
HEALTH Q3 1st part.pptx
 
Communicable diseases
Communicable diseasesCommunicable diseases
Communicable diseases
 
Hira ppt
Hira pptHira ppt
Hira ppt
 
Amoebiasis
AmoebiasisAmoebiasis
Amoebiasis
 
Diseases and health problems
Diseases and health problemsDiseases and health problems
Diseases and health problems
 
Cholera Masterpiece
Cholera MasterpieceCholera Masterpiece
Cholera Masterpiece
 
case study of a female with a parasitic disease Here is a Microbiolog.pdf
case study of a female with a parasitic disease Here is a Microbiolog.pdfcase study of a female with a parasitic disease Here is a Microbiolog.pdf
case study of a female with a parasitic disease Here is a Microbiolog.pdf
 
Amoebiaisis.
Amoebiaisis.Amoebiaisis.
Amoebiaisis.
 
Salmonella
SalmonellaSalmonella
Salmonella
 
BIOLOGY-GRADES-9-STUDENTS-UNIT-4.2P.pptx
BIOLOGY-GRADES-9-STUDENTS-UNIT-4.2P.pptxBIOLOGY-GRADES-9-STUDENTS-UNIT-4.2P.pptx
BIOLOGY-GRADES-9-STUDENTS-UNIT-4.2P.pptx
 

More from Hywel Evans

Sem9
Sem9Sem9
Sem8
Sem8Sem8
Sem7
Sem7Sem7
Sem6 up
Sem6 upSem6 up
Sem6 up
Hywel Evans
 
Sem2 oct42019
Sem2 oct42019Sem2 oct42019
Sem2 oct42019
Hywel Evans
 
Test Review
Test ReviewTest Review
Test Review
Hywel Evans
 
Predicate calculus up
Predicate calculus upPredicate calculus up
Predicate calculus up
Hywel Evans
 
Predicate calculus
Predicate calculusPredicate calculus
Predicate calculus
Hywel Evans
 
Sentence sem1update
Sentence sem1updateSentence sem1update
Sentence sem1update
Hywel Evans
 
Sem6 up
Sem6 upSem6 up
Sem6 up
Hywel Evans
 
Sem6
Sem6Sem6
Sem5
Sem5Sem5
Sem3
Sem3Sem3
Sem4
Sem4Sem4
Bare phrasestructure II
Bare phrasestructure IIBare phrasestructure II
Bare phrasestructure II
Hywel Evans
 
Bare phrase structure
Bare phrase structureBare phrase structure
Bare phrase structure
Hywel Evans
 
65 86 ling3
65 86 ling365 86 ling3
65 86 ling3
Hywel Evans
 
Phrase Structure Rules from 57
Phrase Structure Rules from 57Phrase Structure Rules from 57
Phrase Structure Rules from 57
Hywel Evans
 
Merge rec2
Merge rec2Merge rec2
Merge rec2
Hywel Evans
 
Ling2 gengram
Ling2 gengramLing2 gengram
Ling2 gengram
Hywel Evans
 

More from Hywel Evans (20)

Sem9
Sem9Sem9
Sem9
 
Sem8
Sem8Sem8
Sem8
 
Sem7
Sem7Sem7
Sem7
 
Sem6 up
Sem6 upSem6 up
Sem6 up
 
Sem2 oct42019
Sem2 oct42019Sem2 oct42019
Sem2 oct42019
 
Test Review
Test ReviewTest Review
Test Review
 
Predicate calculus up
Predicate calculus upPredicate calculus up
Predicate calculus up
 
Predicate calculus
Predicate calculusPredicate calculus
Predicate calculus
 
Sentence sem1update
Sentence sem1updateSentence sem1update
Sentence sem1update
 
Sem6 up
Sem6 upSem6 up
Sem6 up
 
Sem6
Sem6Sem6
Sem6
 
Sem5
Sem5Sem5
Sem5
 
Sem3
Sem3Sem3
Sem3
 
Sem4
Sem4Sem4
Sem4
 
Bare phrasestructure II
Bare phrasestructure IIBare phrasestructure II
Bare phrasestructure II
 
Bare phrase structure
Bare phrase structureBare phrase structure
Bare phrase structure
 
65 86 ling3
65 86 ling365 86 ling3
65 86 ling3
 
Phrase Structure Rules from 57
Phrase Structure Rules from 57Phrase Structure Rules from 57
Phrase Structure Rules from 57
 
Merge rec2
Merge rec2Merge rec2
Merge rec2
 
Ling2 gengram
Ling2 gengramLing2 gengram
Ling2 gengram
 

Recently uploaded

Présentationvvvvvvvvvvvvvvvvvvvvvvvvvvvv2.pptx
Présentationvvvvvvvvvvvvvvvvvvvvvvvvvvvv2.pptxPrésentationvvvvvvvvvvvvvvvvvvvvvvvvvvvv2.pptx
Présentationvvvvvvvvvvvvvvvvvvvvvvvvvvvv2.pptx
siemaillard
 
RHEOLOGY Physical pharmaceutics-II notes for B.pharm 4th sem students
RHEOLOGY Physical pharmaceutics-II notes for B.pharm 4th sem studentsRHEOLOGY Physical pharmaceutics-II notes for B.pharm 4th sem students
RHEOLOGY Physical pharmaceutics-II notes for B.pharm 4th sem students
Himanshu Rai
 
ZK on Polkadot zero knowledge proofs - sub0.pptx
ZK on Polkadot zero knowledge proofs - sub0.pptxZK on Polkadot zero knowledge proofs - sub0.pptx
ZK on Polkadot zero knowledge proofs - sub0.pptx
dot55audits
 
BÀI TẬP BỔ TRỢ TIẾNG ANH LỚP 9 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2024-2025 - ...
BÀI TẬP BỔ TRỢ TIẾNG ANH LỚP 9 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2024-2025 - ...BÀI TẬP BỔ TRỢ TIẾNG ANH LỚP 9 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2024-2025 - ...
BÀI TẬP BỔ TRỢ TIẾNG ANH LỚP 9 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2024-2025 - ...
Nguyen Thanh Tu Collection
 
BÀI TẬP DẠY THÊM TIẾNG ANH LỚP 7 CẢ NĂM FRIENDS PLUS SÁCH CHÂN TRỜI SÁNG TẠO ...
BÀI TẬP DẠY THÊM TIẾNG ANH LỚP 7 CẢ NĂM FRIENDS PLUS SÁCH CHÂN TRỜI SÁNG TẠO ...BÀI TẬP DẠY THÊM TIẾNG ANH LỚP 7 CẢ NĂM FRIENDS PLUS SÁCH CHÂN TRỜI SÁNG TẠO ...
BÀI TẬP DẠY THÊM TIẾNG ANH LỚP 7 CẢ NĂM FRIENDS PLUS SÁCH CHÂN TRỜI SÁNG TẠO ...
Nguyen Thanh Tu Collection
 
How to Make a Field Mandatory in Odoo 17
How to Make a Field Mandatory in Odoo 17How to Make a Field Mandatory in Odoo 17
How to Make a Field Mandatory in Odoo 17
Celine George
 
Advanced Java[Extra Concepts, Not Difficult].docx
Advanced Java[Extra Concepts, Not Difficult].docxAdvanced Java[Extra Concepts, Not Difficult].docx
Advanced Java[Extra Concepts, Not Difficult].docx
adhitya5119
 
How to Create a More Engaging and Human Online Learning Experience
How to Create a More Engaging and Human Online Learning Experience How to Create a More Engaging and Human Online Learning Experience
How to Create a More Engaging and Human Online Learning Experience
Wahiba Chair Training & Consulting
 
ANATOMY AND BIOMECHANICS OF HIP JOINT.pdf
ANATOMY AND BIOMECHANICS OF HIP JOINT.pdfANATOMY AND BIOMECHANICS OF HIP JOINT.pdf
ANATOMY AND BIOMECHANICS OF HIP JOINT.pdf
Priyankaranawat4
 
Gender and Mental Health - Counselling and Family Therapy Applications and In...
Gender and Mental Health - Counselling and Family Therapy Applications and In...Gender and Mental Health - Counselling and Family Therapy Applications and In...
Gender and Mental Health - Counselling and Family Therapy Applications and In...
PsychoTech Services
 
UGC NET Exam Paper 1- Unit 1:Teaching Aptitude
UGC NET Exam Paper 1- Unit 1:Teaching AptitudeUGC NET Exam Paper 1- Unit 1:Teaching Aptitude
UGC NET Exam Paper 1- Unit 1:Teaching Aptitude
S. Raj Kumar
 
Film vocab for eal 3 students: Australia the movie
Film vocab for eal 3 students: Australia the movieFilm vocab for eal 3 students: Australia the movie
Film vocab for eal 3 students: Australia the movie
Nicholas Montgomery
 
Liberal Approach to the Study of Indian Politics.pdf
Liberal Approach to the Study of Indian Politics.pdfLiberal Approach to the Study of Indian Politics.pdf
Liberal Approach to the Study of Indian Politics.pdf
WaniBasim
 
Main Java[All of the Base Concepts}.docx
Main Java[All of the Base Concepts}.docxMain Java[All of the Base Concepts}.docx
Main Java[All of the Base Concepts}.docx
adhitya5119
 
writing about opinions about Australia the movie
writing about opinions about Australia the moviewriting about opinions about Australia the movie
writing about opinions about Australia the movie
Nicholas Montgomery
 
The History of Stoke Newington Street Names
The History of Stoke Newington Street NamesThe History of Stoke Newington Street Names
The History of Stoke Newington Street Names
History of Stoke Newington
 
ISO/IEC 27001, ISO/IEC 42001, and GDPR: Best Practices for Implementation and...
ISO/IEC 27001, ISO/IEC 42001, and GDPR: Best Practices for Implementation and...ISO/IEC 27001, ISO/IEC 42001, and GDPR: Best Practices for Implementation and...
ISO/IEC 27001, ISO/IEC 42001, and GDPR: Best Practices for Implementation and...
PECB
 
A Independência da América Espanhola LAPBOOK.pdf
A Independência da América Espanhola LAPBOOK.pdfA Independência da América Espanhola LAPBOOK.pdf
A Independência da América Espanhola LAPBOOK.pdf
Jean Carlos Nunes Paixão
 
Mule event processing models | MuleSoft Mysore Meetup #47
Mule event processing models | MuleSoft Mysore Meetup #47Mule event processing models | MuleSoft Mysore Meetup #47
Mule event processing models | MuleSoft Mysore Meetup #47
MysoreMuleSoftMeetup
 
Hindi varnamala | hindi alphabet PPT.pdf
Hindi varnamala | hindi alphabet PPT.pdfHindi varnamala | hindi alphabet PPT.pdf
Hindi varnamala | hindi alphabet PPT.pdf
Dr. Mulla Adam Ali
 

Recently uploaded (20)

Présentationvvvvvvvvvvvvvvvvvvvvvvvvvvvv2.pptx
Présentationvvvvvvvvvvvvvvvvvvvvvvvvvvvv2.pptxPrésentationvvvvvvvvvvvvvvvvvvvvvvvvvvvv2.pptx
Présentationvvvvvvvvvvvvvvvvvvvvvvvvvvvv2.pptx
 
RHEOLOGY Physical pharmaceutics-II notes for B.pharm 4th sem students
RHEOLOGY Physical pharmaceutics-II notes for B.pharm 4th sem studentsRHEOLOGY Physical pharmaceutics-II notes for B.pharm 4th sem students
RHEOLOGY Physical pharmaceutics-II notes for B.pharm 4th sem students
 
ZK on Polkadot zero knowledge proofs - sub0.pptx
ZK on Polkadot zero knowledge proofs - sub0.pptxZK on Polkadot zero knowledge proofs - sub0.pptx
ZK on Polkadot zero knowledge proofs - sub0.pptx
 
BÀI TẬP BỔ TRỢ TIẾNG ANH LỚP 9 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2024-2025 - ...
BÀI TẬP BỔ TRỢ TIẾNG ANH LỚP 9 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2024-2025 - ...BÀI TẬP BỔ TRỢ TIẾNG ANH LỚP 9 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2024-2025 - ...
BÀI TẬP BỔ TRỢ TIẾNG ANH LỚP 9 CẢ NĂM - GLOBAL SUCCESS - NĂM HỌC 2024-2025 - ...
 
BÀI TẬP DẠY THÊM TIẾNG ANH LỚP 7 CẢ NĂM FRIENDS PLUS SÁCH CHÂN TRỜI SÁNG TẠO ...
BÀI TẬP DẠY THÊM TIẾNG ANH LỚP 7 CẢ NĂM FRIENDS PLUS SÁCH CHÂN TRỜI SÁNG TẠO ...BÀI TẬP DẠY THÊM TIẾNG ANH LỚP 7 CẢ NĂM FRIENDS PLUS SÁCH CHÂN TRỜI SÁNG TẠO ...
BÀI TẬP DẠY THÊM TIẾNG ANH LỚP 7 CẢ NĂM FRIENDS PLUS SÁCH CHÂN TRỜI SÁNG TẠO ...
 
How to Make a Field Mandatory in Odoo 17
How to Make a Field Mandatory in Odoo 17How to Make a Field Mandatory in Odoo 17
How to Make a Field Mandatory in Odoo 17
 
Advanced Java[Extra Concepts, Not Difficult].docx
Advanced Java[Extra Concepts, Not Difficult].docxAdvanced Java[Extra Concepts, Not Difficult].docx
Advanced Java[Extra Concepts, Not Difficult].docx
 
How to Create a More Engaging and Human Online Learning Experience
How to Create a More Engaging and Human Online Learning Experience How to Create a More Engaging and Human Online Learning Experience
How to Create a More Engaging and Human Online Learning Experience
 
ANATOMY AND BIOMECHANICS OF HIP JOINT.pdf
ANATOMY AND BIOMECHANICS OF HIP JOINT.pdfANATOMY AND BIOMECHANICS OF HIP JOINT.pdf
ANATOMY AND BIOMECHANICS OF HIP JOINT.pdf
 
Gender and Mental Health - Counselling and Family Therapy Applications and In...
Gender and Mental Health - Counselling and Family Therapy Applications and In...Gender and Mental Health - Counselling and Family Therapy Applications and In...
Gender and Mental Health - Counselling and Family Therapy Applications and In...
 
UGC NET Exam Paper 1- Unit 1:Teaching Aptitude
UGC NET Exam Paper 1- Unit 1:Teaching AptitudeUGC NET Exam Paper 1- Unit 1:Teaching Aptitude
UGC NET Exam Paper 1- Unit 1:Teaching Aptitude
 
Film vocab for eal 3 students: Australia the movie
Film vocab for eal 3 students: Australia the movieFilm vocab for eal 3 students: Australia the movie
Film vocab for eal 3 students: Australia the movie
 
Liberal Approach to the Study of Indian Politics.pdf
Liberal Approach to the Study of Indian Politics.pdfLiberal Approach to the Study of Indian Politics.pdf
Liberal Approach to the Study of Indian Politics.pdf
 
Main Java[All of the Base Concepts}.docx
Main Java[All of the Base Concepts}.docxMain Java[All of the Base Concepts}.docx
Main Java[All of the Base Concepts}.docx
 
writing about opinions about Australia the movie
writing about opinions about Australia the moviewriting about opinions about Australia the movie
writing about opinions about Australia the movie
 
The History of Stoke Newington Street Names
The History of Stoke Newington Street NamesThe History of Stoke Newington Street Names
The History of Stoke Newington Street Names
 
ISO/IEC 27001, ISO/IEC 42001, and GDPR: Best Practices for Implementation and...
ISO/IEC 27001, ISO/IEC 42001, and GDPR: Best Practices for Implementation and...ISO/IEC 27001, ISO/IEC 42001, and GDPR: Best Practices for Implementation and...
ISO/IEC 27001, ISO/IEC 42001, and GDPR: Best Practices for Implementation and...
 
A Independência da América Espanhola LAPBOOK.pdf
A Independência da América Espanhola LAPBOOK.pdfA Independência da América Espanhola LAPBOOK.pdf
A Independência da América Espanhola LAPBOOK.pdf
 
Mule event processing models | MuleSoft Mysore Meetup #47
Mule event processing models | MuleSoft Mysore Meetup #47Mule event processing models | MuleSoft Mysore Meetup #47
Mule event processing models | MuleSoft Mysore Meetup #47
 
Hindi varnamala | hindi alphabet PPT.pdf
Hindi varnamala | hindi alphabet PPT.pdfHindi varnamala | hindi alphabet PPT.pdf
Hindi varnamala | hindi alphabet PPT.pdf
 

Changing world