Using fewer things that create greenhouse gases is the first step. Use less electricity and less hot water, and decrease your use of things that burn fossil fuels -- like your car. And if you have to drive, make sure your car is properly tuned up. Choosing energy-efficient light bulbs is also a good idea, and recycling can reduce the amount of methane gas released by garbage in a landfill. Planting trees can also be a great way to help increase oxygen and reduce carbon dioxide.
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