Why is it so hot now?

There are both natural and man-made reasons for climate warming, such as air conditioning, which seems to bring us coolness. In fact, for the global environment, it is warming up, not cooling down.

It is human beings who overdraw the future coolness for the sake of immediate coolness. Think about it, where did the heat generated by the operation of air-conditioned cars go? So I think it's better for us to use air conditioners and cars as little as possible, ride bicycles more, or turn up the temperature of air conditioners.