Ozone Depletion
The ozone layer is a huge force feild that covers the Earth and blocks the altrviolet rays from the sun. The ozone can be depeted by people using machinary, the fumes from the exhaustes pollutes the Earth and creates holes in the ozone layer. If we continue to do this, the ozone layer will be completely depeted and if this happenes it will let in the altrviolet rayesand we can die from skin diseases and it will cause Global Warming.
Here is a picture of the Ozone layer and Global Warming