Question

What in the passage has been cited as the main reason affecting global temperatures?

Answer 1

Green house effect will be the answer

Answer 2

One of the main reasons that the passage cited for the global temperatures rising was that there was some amount of water vapor in the stratosphere and this has been reduced by a certain amount an hence it doesn't absorb much of the heat and hence it is the utmost important thing to do is to reduce the amount of global warming that we human's cause.