The document discusses several major human impacts on the environment in Mexico, including:
1) Widespread problems with pollution of rivers and groundwater from sewage and industrial waste, lack of hazardous waste facilities, and water scarcity issues across the country.
2) Rampant deforestation due to fires, agriculture, logging, and development leading to issues like soil erosion, desertification, and loss of habitat for plants and animals.
3) High levels of air and water pollution in major urban areas like Mexico City due to vehicle and industrial emissions.
The detail information about types of soil degradation and factors affecting soil degradation.
SSAC-242 Problematic soil and their management.
Lecture No. 1 Soil Degradation- definition, types, factors, processes.
The detail information about types of soil degradation and factors affecting soil degradation.
SSAC-242 Problematic soil and their management.
Lecture No. 1 Soil Degradation- definition, types, factors, processes.
Land is a complex, multi-component natural entity that becomes a resource base when used for a specific purpose or purposes. Land degradation is a concept in which the value of the biophysical environment is affected by one or more combination of natural and human-induced processes acting upon the land. It is a temporary or Permanent decline in the productive capacity of land. It is also the reduction in the capability of the land to produce benefits from a particular land use under a specified form of land management. Major forms of land degradation are water and wind erosion, desertification and chemical erosion. Urban expansion is also a form of land degradation. Negative effects of land degradation affect heavily on environment and economy which is a cause of grave concern. Land degradation has significant costs, particularly in developing countries (Rosegrant and Ringler, 1991). It does not only reduces farm productivity affecting livelihood and regional economies, it also leads to reduced biodiversity. Land degradation in most developing countries is becoming a major constraint to future growth and development. About 40-75% of the world’s agricultural land’s productivity is reduced due to land degradation (IFPRI, 2001). Increased support for research and extension to increase crop yields is crucial to meeting the needs of a growing human population for food, biomass energy, fiber, and timber. There is a need to increase support to biodiversity preservation by alleviating pressure to convert remaining natural habitat to croplands. There is a need for more public investments to support SLM to slow land degradation.
Over the past few decades, the increase in population and advances made in farming technology has increased the demand for crops and livestock from the agricultural industry. This growth in agricultural production has resulted in an increase in contaminants polluting soil and waterways.
IFPRI Policy Seminar “Economics of Land Degradation and Improvement--A Global Assessment for Sustainable Development” held on December 3, 2015. Presentation by Rattan Lal, Carbon Management and Sequestration Center.
Land is a complex, multi-component natural entity that becomes a resource base when used for a specific purpose or purposes. Land degradation is a concept in which the value of the biophysical environment is affected by one or more combination of natural and human-induced processes acting upon the land. It is a temporary or Permanent decline in the productive capacity of land. It is also the reduction in the capability of the land to produce benefits from a particular land use under a specified form of land management. Major forms of land degradation are water and wind erosion, desertification and chemical erosion. Urban expansion is also a form of land degradation. Negative effects of land degradation affect heavily on environment and economy which is a cause of grave concern. Land degradation has significant costs, particularly in developing countries (Rosegrant and Ringler, 1991). It does not only reduces farm productivity affecting livelihood and regional economies, it also leads to reduced biodiversity. Land degradation in most developing countries is becoming a major constraint to future growth and development. About 40-75% of the world’s agricultural land’s productivity is reduced due to land degradation (IFPRI, 2001). Increased support for research and extension to increase crop yields is crucial to meeting the needs of a growing human population for food, biomass energy, fiber, and timber. There is a need to increase support to biodiversity preservation by alleviating pressure to convert remaining natural habitat to croplands. There is a need for more public investments to support SLM to slow land degradation.
Over the past few decades, the increase in population and advances made in farming technology has increased the demand for crops and livestock from the agricultural industry. This growth in agricultural production has resulted in an increase in contaminants polluting soil and waterways.
IFPRI Policy Seminar “Economics of Land Degradation and Improvement--A Global Assessment for Sustainable Development” held on December 3, 2015. Presentation by Rattan Lal, Carbon Management and Sequestration Center.
Floods occur somewhere in the world 10,000 times or more each year. With 2015’s spring floods only weeks away, it’s past time to speed up the long-term recovery process for floods. In 2008, after weeks of flooding through Iowa, Illinois, Missouri, Indiana and Wisconsin, the region faced billions of dollars in losses, threats of disease, and a long cleanup. Losses included millions of acres of prime farm land that are still requiring restoration and the rebuilding of large urban areas such as Cedar Rapids, Iowa which alone is estimated to have required at least $1 billion. However, the total direct and indirect losses may never be known. Flood waters during the summer of 2008 seeped into countless wells, affecting drinking water for thousands of homes and businesses across the region. Hazardous materials were also released into the flood waters that ultimately emptied into the Gulf of Mexico exacerbating what marine biologists call a “dead zone” – bodies of water so starved for oxygen that aquatic life can no longer be supported. Presentation courtesy of Dr Walter Hays, Global Alliance for Disaster Reduction.
In this ppt i try to explain introduction of land degradation .and also causes of it .and explain with figure . i expect that my ppt usefull to all.THIS PPT use for enviroment also.
The Indian economy is classified into different sectors to simplify the analysis and understanding of economic activities. For Class 10, it's essential to grasp the sectors of the Indian economy, understand their characteristics, and recognize their importance. This guide will provide detailed notes on the Sectors of the Indian Economy Class 10, using specific long-tail keywords to enhance comprehension.
For more information, visit-www.vavaclasses.com
This is a presentation by Dada Robert in a Your Skill Boost masterclass organised by the Excellence Foundation for South Sudan (EFSS) on Saturday, the 25th and Sunday, the 26th of May 2024.
He discussed the concept of quality improvement, emphasizing its applicability to various aspects of life, including personal, project, and program improvements. He defined quality as doing the right thing at the right time in the right way to achieve the best possible results and discussed the concept of the "gap" between what we know and what we do, and how this gap represents the areas we need to improve. He explained the scientific approach to quality improvement, which involves systematic performance analysis, testing and learning, and implementing change ideas. He also highlighted the importance of client focus and a team approach to quality improvement.
The French Revolution, which began in 1789, was a period of radical social and political upheaval in France. It marked the decline of absolute monarchies, the rise of secular and democratic republics, and the eventual rise of Napoleon Bonaparte. This revolutionary period is crucial in understanding the transition from feudalism to modernity in Europe.
For more information, visit-www.vavaclasses.com
The Art Pastor's Guide to Sabbath | Steve ThomasonSteve Thomason
What is the purpose of the Sabbath Law in the Torah. It is interesting to compare how the context of the law shifts from Exodus to Deuteronomy. Who gets to rest, and why?
Students, digital devices and success - Andreas Schleicher - 27 May 2024..pptxEduSkills OECD
Andreas Schleicher presents at the OECD webinar ‘Digital devices in schools: detrimental distraction or secret to success?’ on 27 May 2024. The presentation was based on findings from PISA 2022 results and the webinar helped launch the PISA in Focus ‘Managing screen time: How to protect and equip students against distraction’ https://www.oecd-ilibrary.org/education/managing-screen-time_7c225af4-en and the OECD Education Policy Perspective ‘Students, digital devices and success’ can be found here - https://oe.cd/il/5yV
How to Make a Field invisible in Odoo 17Celine George
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How to Split Bills in the Odoo 17 POS ModuleCeline George
Bills have a main role in point of sale procedure. It will help to track sales, handling payments and giving receipts to customers. Bill splitting also has an important role in POS. For example, If some friends come together for dinner and if they want to divide the bill then it is possible by POS bill splitting. This slide will show how to split bills in odoo 17 POS.
3. Problems
• scarcity of hazardous
waste disposal facilities
• natural freshwater
resources scarce and
polluted in
north, inaccessible and
poor quality in center
and extreme southeast
• raw sewage and
industrial effluents
polluting rivers in urban
areas
• Deforestation
• widespread erosion
• desertification
deteriorating
agricultural lands
• serious air and water
pollution in the national
capital and urban
centers along US-Mexico
border
• land subsidence in
Valley of Mexico caused
by groundwater
depletion
4. Deforestation
• http://www.aae.wisc.edu/news/11/
• http://worldwildlife.org/threats/deforestation
• http://environment.nationalgeographic.com/environment/global-
warming/deforestation-overview/
• Forms:
– fires
– clear-cutting for agriculture
– ranching and development
– unsustainable logging for
timber
– degradation due to climate
change
• Facts:
– The world’s rain forests could
completely vanish in a
hundred years at the current
rate of deforestation
– Seventy percent of Earth’s
land animals and plants live
in forests, and many cannot
survive the deforestation that
destroys their homes.
– Forest soils are moist, but
without protection from sun-
blocking tree cover they
quickly dry out. Trees also
help perpetuate the water
cycle by returning water
vapor back into the
atmosphere.
5.
6. Extinction
• http://edition.cnn.com/2008/WORLD/americas/03/17/mexico.nature3/
• http://www.explorandomexico.com/about-mexico/8/358/
• CAUSES:
– Neglect
– Excessive hunting
– Threatening Conditions in Environment
• Animals Become
– Vulnerable
– Threatened
– Endangered
– Extinct
• It is necessary that the organic and
inorganic elements of the environment
be in balance. If some being or factor
undergoes some type of alteration
(absence, mutation, decrease or increase)
in the long run, the whole habitat will
suffer from it, and in turn, be at risk of
disappearing.
• Extinct:
– The Mexican wolf
– The Imperial Woodpecker
– The Passenger Pigeon
– The Trumpeter Swan
– The Elf Owl
– The Caribbean Monk Seal
• Threatened Species:
– The jaguar
– The black bear
– The Socorro Dove
– The Volcano Rabbit
– The crocodile
– The Harpy Eagle
– The Antelope
8. Loss of Soil
• http://topsoil.nserl.purdue.edu/nserlweb-
old/isco99/pdf/ISCOdisc/SustainingTheGlobalFarm/P109-Ventura.pdf
• Soil Erosion is a result of
intensive maize
cultivation on areas with
steep slopes
• Soil Erosion is a result of
deforestation for
agriculture
• If the rate of erosion
exceeds the rate of soil
formation (from rock and
decomposing organic
matter), then the land
will become infertile.
• Deforestation or other
vegetation often leads to
serious soil
erosion, because plant
roots bind soil, and
without them the soil is
free to wash or blow
away,
9. Flooding
• http://www.bbc.co.uk/news/world-latin-america-11226611
• Deforestation has
allowed silt to fill in
rivers thereby
reducing their capacity
and making floods
more likely
• Causes of Flooding:
– The constant
extraction of
petroleum and gas
– the construction of
dams in the zone
– the erosion of land
and deforestation
10.
11. Water Pollution (Sewage)
• http://latimesblogs.latimes.com/lanow/2012/08/san-diego-beaches-closed-sewage-spill.html
• http://room233.wikispaces.com/Water+and+water+pollution
• http://www.redorbit.com/news/science/1991897/pollution_threatening_mexicos_riviera_maya_r
egion/
• Sewage, manure, and
chemical fertilizers, contain
"nutrients" such as nitrates
and phosphates. Deposition of
atmospheric nitrogen (from
nitrogen oxides) also causes
nutrient-type water pollution.
• Direct sources include effluent
outfalls from
factories, refineries, waste
treatment plants etc.. that
emit fluids of varying quality
directly into urban water
supplies.
• Indirect sources include
contaminants that enter the
water supply from
soils/groundwater systems
and from the atmosphere via
rain water. Soils and
groundwaters contain the
residue of human agricultural
practices
(fertilizers, pesticides, etc..)
and improperly disposed of
industrial wastes.
12.
13. CO2 Build Up
• http://www.peoplesworld.org/greenhouse-gases-building-up-in-the-atmosphere/
• http://rainforests.mongabay.com/0907.htm
• Autotrophs draw in
Carbon Dioxide for
Photosynthesis and
with deforestation a
great amount of it
• The clearing and
burning of tropical
forests and peat lands
releases more than a
billion metric tons of
carbon
• Greenhouse Effect:
– Greenhouse gases (CO2)
are transparent to
incoming solar
radiation. This radiation
reaches the earth's
surface and heats it.
Greenhouse gasses trap
heat in the atmosphere.
As greenhouse gases
build up, more heat is
trapped in the
atmosphere.
14. AIR POLLUTION
• http://corrosion-doctors.org/AtmCorros/mapMexico.htm
• Exhaust fumes from Mexico City's 3 million cars are
the main source of air pollutants
• Mexico is home to many assembly plants
"maquiladoras" that are responsible for the release
of dangerous substances into the environment.
• The most important air pollutants of Mexico City
are ozone (O3), sulfur dioxide (SO2), precursors like
nitrogen oxides (NOX), hydrocarbons (HC), and
carbon monoxide (CO), that originate from the
incomplete combustion of fossil fuels.