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GLOBAL WARMING

GLOBAL WARMING. Green house effect is an important natural process. Without it, the Earth would be too cool for the survival of living organisms. Carbon dioxide is the main green house gas.

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GLOBAL WARMING

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  1. GLOBAL WARMING

  2. Green house effect is an important natural process. • Without it, the Earth would be too cool for the survival of living organisms. • Carbon dioxide is the main green house gas. • But…human activities had released more green house gases to the atmosphere. CFC, methane, nitrous oxide and ozone. • The green house effect. Will increase the Earth temperature • This phenomenon known as GLOBAL WARMING.

  3. Other things we do send greenhouse gases into the air too; • The trash that we send to landfills produces a greenhouse gas called methane. • Whenever we drive or ride in a car, we are adding greenhouse gases to the • atmosphere. • When factories produce things that we buy and use everyday, they too are • sending greenhouse gases into the air.

  4. Earth has been warmed by about 1ºF (0.6 °C) over the past 100 years. And way this happened? Global Warming:Global warming refers to an average increase in the Earth's temperature, which in turn causes changes in climate. The Greenhouse Effect: Greenhouse gases make the Earth warmer by trapping energy in the atmosphere. Have you ever seen a greenhouse?

  5. The sun heats up the Earth. Some • of the sun’s solar rays bounce off • of the Earth’s atmosphere and • return to outer space. Some make • it all the way to the surface of the • Earth. • 2. The rays that reaches the Earth warm • the Earth. When the Earth is warm, • it radiates its own rays of heat, called • infrared rays. Some of these rays • escape to outer space. • 3. Others are absorb by gases called • “greenhouse gases” which radiate • heat. Greenhouse gases allow the • earth to be in just the right temperature • for life. • 4. Higher concentrations of carbon dioxide and other "greenhouse" gases (methane, nitrous oxide, ozone and water vapor) trap more infrared energy in the atmosphere than occurs naturally. The additional heat further warms the atmosphere and Earth’s surface.    

  6. Sometimes little things can turn into big things. • Human Health • Climate changes may affect people's health both directly and indirectly. • Ecological Systems • Alter the world's habitats and ecosystems – all living things. • Sea Level Rise • Global warming may make the sea level become higher. Crops and Food Supply • cold places - chance to grow crops in new areas. • warm places - bring drought.

  7. When the Earth temperature is increase, It will cause the melting of the ice sea. This phenomenon, will increase the sea level. Can you imagine what will happen if the ice still melt year by year??

  8. Global warming may be a big problem, but there are many little things we • can do to make a difference. • 1.Governments can adopt a range of options for reducing greenhouse gas emissions, including • encouraging the use of renewable energy sources (such as wind and solar power) • eliminating subsidies that encourage the use of coal and oil by making them • artificially cheap • protecting and restoring forests, which serve as important storehouses of carbon • 2.Individuals can reduce the need for fossil fuels and often save money by • driving less and driving more fuel-efficient and less-polluting cars • using energy-efficient appliances • using less electricity in general

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