Question

a)
What do you understand by global warming?
b)
Why do we measure the height of the place from sea level?​

Answer 1

Answer:

a.when the average temperature of the atmosphere increase by some green house gases as carbon dioxide ,it is called global warming

b. the earth surface is not plane .but the sea level is same in the whole world .so we measure the height of the place from sea level

Answer 2

Explanation:

your ans is here..

I hope it helpful to you.....