People are using many cars, aeroplanes, trains and power stations. People are also cutting down lots of trees. Trees clean the air.
As the earth is getting hotter, disasters like hurricanes, droughts and floods are getting more frequent.
Global warming is a very difficult problem to fix. People agree on what to do about it. Wasting energy is a bad thing to do, but some people think that the government should make laws about it, while other people think it should be up to each person or business to decide what to do. Scientists agree that the burning of fossil, fuels are causing global warming. Since these fuels are burned for energy and everyone uses energy, every one can help stop global warming just by using less energy. Think about the things you use each day that use energy. The lights in your house, the TV and the computer, the washing machine, the dishwasher and dryer all use gas or electricity. Every time you ride in your car, it uses gas.
Global warming is bad. Cars pollute the air. Methane is released into the atmosphere from a dozen major sources that are both natural and man made. Natural release of methane is primarily from wetlands, agricultural lands, termites and the ocean. Non-organic releases are based from landfills, farm animals, waste treatment, and sewage treatment.
Scientists agree that the burning of fossil fuels like oil and coal cause greenhouses gases to escape into the air and that these gases are causing most of the warming. Another cause is deforestation (cutting down trees). Trees soak up carbon dioxide, one of the greenhouse gases, from the air. Global warming refers to the increase of the Earth’s average surface temperature, due to a build-up of greenhouse gases in the atmosphere. If the warming gets worse, as scientists expect, there may be some kinds of plants and animals that become extinct because they can’t move to new homes.
The Earth is wrapped in a blanket of air called the ‘atmosphere’, which is made up of several layers of gases. The gases in the atmosphere stop some of the heat from escaping into space.
The windows of a greenhouse play the same role as the gases in the atmosphere, keeping some of the heat inside the greenhouse.
Some of the activities of man produce greenhouse gases. A lot of scientists agree that man’s activities are making the natural greenhouse effect stronger.
If we carry on polluting the atmosphere with greenhouse gases, it will have very dangerous effects on the earth. Winter and summer temperatures will increase and the weather will be warmer. Some places will be at risk from drought.
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