Question

what do you mean by global warming? State its effect at poles and sea levels

Answer 1

global warming is the rise in the tenp of the whole globe becoz of humans harmful actions
at poles the glaciers will melt resulting in the inc. of sea levels to a harmful extent

Answer 2

Global warming is the gradual rise in the Earth's temperature caused by high levels of carbon dioxide and other gases in the atmosphere.
eg.
The threat of global warming will eventually force the U.S. to slow down its energy consumption