Question

what is global warming​

Answer 1

Answer:

Global warming is the unusually rapid increase in Earth's average surface temperature over the past century primarily due to the greenhouse gases released by people burning fossil fuels.

Answer 2

Global warming is the unusually rapid increase in Earth's average surface temperature over the past centuries.

This is caused by:

1) Burning of fossil fuels.

2) Deforestation ( clearing of trees )

3) Improper use of fertilisers that release nitrous oxide.