There are many solutions to reduce the increasing of carbon dioxide. We shouldn't travel by air but of course it's difficult to us. Another solution is using renewable energy. For example we have to stop using oil and gas because they wastage energy and I think the government should find out another renewable energy. We have to using a mass transit more than using car and train. The third solution is growing trees. Trees can give O2 and take CO2. Human can also reduce buying food, traveling by train, wasting electricity.
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