Mystery #4Tier 2-3energy / climate
Why does burning fuels for energy end up heating the whole planet?
Burning fuel to make energy seems like it should just heat up the spot where it burns, and no further. Yet scientists are certain that burning coal, oil and gas is slowly warming the entire planet, oceans, ice caps and all. Somehow a flame in one place changes the whole world's temperature. So why does burning fuel warm up the whole planet?

Your guess
What do you think burning fuel puts into the air, and what might it do up there?
There's no single magic word to type, have a go in your own words, then reveal the answer to see how close you got.
Make a guess to unlock the hints and the answer.