The U.S. Environmental Protection Agency recently proposed new ozone standards to protect health and environmental values. These standards will apply to the lower atmosphere, to the air we breathe. In the upper atmosphere, ozone is good.
The “hole” in the ozone layer over Antarctica has worried scientists for years since ozone in the upper atmosphere protects the Earth from harmful ultraviolet radiation from the Sun.
According to research at the University of Leeds, the hole in the ozone layer is now steadily closing. This is a concern, since its repair could actually increase warming in the southern hemisphere, the scientists at Leeds conclude.