Global Warming Power Point
Transcript of Global Warming Power Point
Global Warming PowerPointBy: Michelle Ho
RadiationThe radiation is trapped inside the
atmosphere when it is received in the highest layer in the atmosphere
Some of the radiation is reflected off clouds and into space
The radiation that goes into the atmosphere is absorbed by oxygen and water vapor
Radiation that comes back to Earth from clouds is absorbed by greenhouse gases
The radiation that reaches the Earth is not all used in its surface because some of it is absorbed by seas and oceans
If the Earth gets more clouds, more radiation will be reflected back into space and less will reach the surface
Greenhouse Gases Each CO2 molecule consist of one carbon atom with an oxygen atom bonded to each side
The carbon dioxide molecule absorb radiation and the molecule starts to vibrate
The vibrating molecule would absorb radiation again and it would be absorbed by another greenhouse gas molecule
Carbon Dioxide is recycled through photosynthesis
Carbon dioxide goes into the air when humans breathe out, burn fossil fuels for energy, and deforest the planet
Fossil FuelsFossil fuels contain carbon and when
they are burned, they combine with oxygen to form CO2
Oil burning is responsible for 30% of all CO2 in the air
Natural gas doesn’t release as much CO2 because of its methane structure
Coal and oil are composed with more complex molecules which mean that they release ash particles into the environment that doesn’t burn which are carried to the atmosphere and cause pollution
Natural gases releases small levels of CO2 and no ash
Climate Change Higher temperatures are caused by more
greenhouse gases in the environment Sea levels rise due to melting glacier ice and
expansion of warmer water Warmer waters in the oceans caused the death
of a quarter of the world’s coral reefs With more moisture in the air, precipitation
occurs which can lead to flooding Higher temperatures cause evaporations and
more droughts because more water is soaked up
There are more frequent heat waves The Antarctic Peninsula warmed 5 times faster
than the global average The warm moisture from waters caused more
hurricanes The weather causes changes in which plants
and animals can live and loss of water supplies that come from glaciers
Proof of Global Warming
Each year, the temperature increase by 5 degrees Celsius
More than a million square kilometers of sea ice were missing in the summer of 2007 compared to the previous year
June’s land and sea surface temperatures were the second hottest record over the past decade
Study shows that the troposphere was warming 0.2 degrees Celsius
The stratosphere is cooling 5 times faster than the troposphere is warming which means that there’s an increase of greenhouse gases
The Kyoto AccordThe Kyoto Accord wanted to decrease
overall greenhouse gases among the nations
The United States and Australia refused to confirm the treaty but still are expected to take some methods
To stabilize CO2 levels, total greenhouse gas emissions must be cut by 60-80% within 50 years
Under the Kyoto, the European Union must reduce emissions by 8%
The United States refused to confirm it but committed to a 7% reduction
The United States increased the gas emissions by 0.7 % in 2002
Debate About Global Warming
Some scientists say that some of the results of short-term weather conditions and not long-term climate trends and they say that human disruption of natural warming cycles possibly won’t affect sea levels
Policy makers have a hard time deciding about what the countries should do to limit greenhouse gases in case global warming is caused from them
United States Producing Greenhouse Gases
United States uses a lot of deforestation which means that people are clearing new land for farming and pastures used for animals
Trees absorb carbon but we cut and burn them down
When trees are burnt down, carbon is released into the air and carbon bonds with oxygen to form greenhouse gases
We also drive a lot vehicles, which is different from Asia because they usually ride bikes to get somewhere and driving vehicles is burning fossil fuels