Which list contains only renewable energy?
What happens when the levels of greenhouse gases increase?
Carbon dioxide and methane are examples of what?
Which is a way to conserve a nonrenewable resource?
Which is a natural resource?
What is the original source of all energy on Earth?
Which is a cause of the Earth's average temperature increasing?
Which soil conservation technique involves planting crops in different parts of a farm each year?
How is the sun responsible for wind power?
What is an effect of our use of fossil fuels?
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