slide 1:Topic Name[climate change(it's cause and effects)]
Presented by Bisma
slide 2: Contents
Introduction
What is climate change?
Why does our climate change?
Factors that affect climate change
What is global warming?
How will climate change affect people?
What can be done to improve our climate?
slide 3:INTRODUCTION
Have you noticed that today, everyone speaks about climate change? Learn from this presentation and be the one who knows best!
Before explaining what climate change is, do you know the difference between weather and climate?
Slide 4:WEATHER & CLIMATE
Weather describes whatever is happening outdoors in a given place at a given time. It is measured through wind, temperature, humidity, atmospheric pressure, cloudiness, and precipitation.
Climate is the average of weather over time. Climate tells us what weather is usually like in a given place.
slide 5: WHAT IS CLIMATE CHANGE?
Climate change is the change in climate over a time period from 10 to 100s of years.
Climate change involves both natural changes and changes caused by people.
slide 6: WHY DOES OUR CLIMATE CHANGE?
Over the history of the planet, the climate has changed naturally. It happened during the ice ages, and maybe also when the dinosaurs disappeared.
In addition, human activities have warmed the climate.
slide 7: FACTORS THAT AFFECT CLIMATE CHANGE:
>NATURAL FACTORS
SUN,VALCANOES
>HUMAN FACTORS
GREENHOUSE GASES,AEROSOLS,DEFORESTATION
slide 8: THE SUN
The amount of energy coming off the Sun is not constant but keeps changing
Slow changes in the Earth's distance from the Sun affect the amount of energy received from the Sun.
Those variations are believed to be one of the causes that start ice ages.
slide 9: THE VOLCANOES
Volcanoes - when a volcano erupts it throws out large amounts of sulphur dioxide (SO2), water vapour, dust, and ash into the atmosphere.
slide 10:GREENHOUSE GASES
Human activities send gases (for example methane, carbon dioxine CO2) into the atmosphere that enhance the greenhouse effect. Many of the gases come from fossil fuels such as oil, coal and natural gas to run vehicles, and generate electricity for industries or households.
When the atmosphere contains too much of those gases, the whole atmosphere and the Earth becomes hotter, like it does in a greenhouse. The atmosphere holds on to too much heat, instead of letting it escape into space.
This causes global warming !
slide 11: picture depicting green house effect
slide 12: AEROSOLS
Aerosols are tiny solid particles or liquid droplets that remain suspended in the atmosphere for a long time.
slide 13: DEFORESTATION
slide 14: WHAT IS GLOBAL WARMING
slide 15: HOW WILL CLIMATE CHANGE AFFECT PEOPLE?
slide 16: WHAT CAN WE DO TO IMPROVE OUR CLIMATE?
slide 17: Thank you slide
2. CONTENTS
โข Introduction
โข What is climate change?
โข Why does our climate change?
โข Factors that affect climate change
โข What is global warming?
โข How will climate change affect people?
โข What can be done to improve our climate?
3. INTRODUCTION
โข Have you noticed that today, everyone speaks about climate change? Learn
from this presentation and be the one who knows best!
โข Before explaining what climate change is, do you know the difference
between weather and climate?
4. WEATHER & CLIMATE
The weather:
โข Weather describes whatever is
happening outdoors in a given
place at a given time. It is measured
through wind, temperature, humidity,
atmospheric pressure, cloudiness, and
precipitation.
The climate:
โข Climate is the average of weather
over time.
โข Climate tells us what weather is usually
like in a given place.
5. WHAT IS CLIMATE CHANGE?
โข Climate change is the change in climate over a time
period from 10 to 100s of years.
โข Climate change involves both natural changes and
changes caused by people.
6. WHY DOES OUR CLIMATE CHANGE?
โข Over the history of the planet, the climate has changed naturally. It
happened during the ice ages, and maybe also when the dinosaurs
disappeared.
โข In addition, human activities have warmed
the climate.
7. FACTORS THAT AFFECT CLIMATE
CHANGE:
โข NATURAL FACTORS
โข SUN
โข VALCANOES
โข HUMAN FACTORS
โข GREENHOUSE GASES
โข AEROSOLS
โข DEFORESTATION
8. 1. THE SUN
โข The amount of energy coming off the Sun is not constant
but keeps changing
โข Slow changes in the Earth's distance from the Sun affect
the amount of energy received from the Sun.
โข Those variations are believed to be one of the causes that
start ice ages.
9. 2. THE VOLCANOES
โข Volcanoes - when a volcano erupts
it throws out large amounts of
sulphur dioxide (SO2), water
vapour, dust, and ash into the
atmosphere.
10. 3. GREENHOUSE GASES
โHuman activities send gases (for example methane, carbon dioxine CO2) into the
atmosphere that enhance the greenhouse effect. Many of the gases come from
fossil fuels such as oil, coal and natural gas to run vehicles, and generate electricity
for industries or households.
โWhen the atmosphere contains too much of those gases, the whole atmosphere
and the Earth becomes hotter, like it does in a greenhouse. The atmosphere holds
on to too much heat, instead of letting it escape into space.
โThis causes global warming !
11.
12. 4. AEROSOLS
โข Aerosols are tiny solid particles or
liquid droplets that remain
suspended in the atmosphere for a
long time.
13. 5. DEFORESTATION
โข There are over 6 billion people on Earth.
Humans continue replacing forests and
natural vegetation with agricultural lands.
More and more people move into cities,
therefore more houses are built. All this
has an impact on climate.
โข For example, it affects the evaporation of
water and therefore the rain cycle.
14. WHAT IS GLOBAL WARMING
โข It refers to an average increase in the Earth's
temperature, which in turn causes changes in climate.
โข A warmer Earth leads to a wide range of impacts on
plants, wildlife, and humans.
15. HOW WILL CLIMATE CHANGE AFFECT
PEOPLE?
โ Increase in intensity of hurricanes.
โ Increase in droughts in some places.
โ Increase in intense rain in some places.
16. WHAT CAN WE DO TO IMPROVE OUR
CLIMATE?
โข To reduce greenhouse gas emissions
โข To adapt to climate change (for example with better alert
systems, water and food management).
The greenhouse effect: certain โgreenhouseโ gases in the atmosphere permit sunlight to pass through the atmosphere, but absorb much of the infrared (heat) radiation from Earthโs surface. The atmosphere warms, and radiates additional heat to the surface. The planetโs temperature is therefore higher than it would be without greenhouse gases, and it stands to reason that adding more greenhouse gases to the atmosphere is likely to warm the planet.
