Sun
The sun's hot rays
The sun has many powerful rays that get blocked by Earth’s ozone layer of the atmosphere. Only the less powerful rays that will not harm anyone too badly get inside of Earth’s atmosphere. Once the sun’s rays get inside of Earth’s atmosphere, they get stuck inside. Our atmosphere works like a greenhouse. Every fifteen minutes, the sun provides us with enough energy to power Earth for a year. We haven’t found the right technology to make this happen.