Stratospheric ozone destruction involves a complex series of reactions. These reactions begin with . O3 reacting with industrial sulfuric acid UV from sunlight reacting directly with O3 UV from sunlight being trapped in the troposphere O3 reacting directly with CFCs UV from sunlight causing Cl atoms to break free from CFCs

This is all you, but i can give you some topics that you could try. if it rained when you want to do something outdoors, it 'limits' that human activity. maybe you want to do an experiment that goes throughout the whole year and you have to have above freezing the entire year. this 'limits' your activity. i thought of those just off of the top of my head. something that gets to me that might be getting to you is you are thinking too hard about what to do. think simply, and if it is too simple, then bump it up just a little bit.

Climate change to earth function human can't reduce climate

Hey there  jaylajakara15p8gvfy! question:   approximately what per cent of russia is used for permanent cropland? answer: b) 10%hope this ! -jayden

D: sill  is what it is on edgenuity!