Which of these protects the earth from harmful radiation when found in the stratosphere, but is a pollutant at lower altitudes

The atmosphere is like a blanket for our planet, within this atmosphere, there's a layer called "The ozone layer" which protects our planet from most of the sun's harmful rays. And yes, the ozone layer has holes, because of the pollution.

Cpopulation density

He want to contact the red cross/red crescent because they are the main non profit organization that deals with disasters around the world