Have you heard about that Polar Bears are becoming extinct? Have you you heard about the shrinkage of sea ice? These are some of the effects of global warming. Global warming is one of the top crises according to World Leaders.
There two types or kinds of causes for global warming: human activity and natural causes.One natural cause of global warming is the methane gas release from Arctic tundra, and wetlands. Methane is a green house gas and greenhouse gases traps heat from the the earth's surface. Some human activity are pollution, and population. Pollution is one of the largest man-made problems that is causes burnings of fossil fuels. When fossil fuel are burned, a type of greenhouse gas is sent into the air that includes methane. Population has been also a cause of global warming because more people means more methods of transportation. This will include more methane and agriculture.
Global warming has been causing climate changes. Climate changes might cause rising sea levels, and glaciers to melt. Sea ice has decreased 10 percent over these years. Also animals or species including polar bears, pandas, and the hamster like pika that are struggling to adapt to the climate changes will face extinction if people do not try to stop global warming.
You can help stop or prevent global warming by conserving energy by starting to use compact fluorescent light bulbs. You also only drive your car only few miles or walking more often to prevent pollution, one of the causes of global warming.
Your speech is very informative and that is very good. I like how for all of your reasons you had supporting facts about them. Also how you have talked about different effects of global warming. However I'd encourage you to make your intro have more of a hook. Other than that your speech is well done.
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