Air pollution is increased when chemicals are released by power plants. a. nuclear b. electric c. coal-burning d. natural gas ! 18 pts.

Sooo im pretty sure that its coal burning plantsjust because ive heard that coal creates like 75% of the pullution in the air but i wouldnt be surprised if it was nuclear..because if every nuclear power plant went boom..nobody would be aliveeven if it was only one that went off..its a freaking disaster all over that country

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.

Geothermic gradient is the rate of increasing temperature with respect to increasing the depth in the earths interior. away from tech tonic plates boundaries, it is about 25-40 c/km (72-87 degrees f/mi) of depth near the surface in most of the world.