Chlorofluorocarbons are destroying the ozone layer, but propane, which bonds to them, could be used to remove them from the atmosphere.
We can manufacture ozone molecules from oxygen, but not enough to patch up the ozone layer.
Used coffee grounds can be recycled to make air filters that remove methane, a powerful greenhouse gas, from the atmosphere.
We're finally starting to see positive results from environmental efforts to protect the Ozone Layer.
Air pollution might be the tell-tale sign of alien civilizations.
It smells like rain, but how? Find out in today's A Moment of Science.
Pollution in cities is pretty much an accepted thing, but what about pollution in the country? Learn about pollution on this Moment of Science.
There are actually two types of smog: sulfurous smog and photochemical smog. Sulfurous smog results from burning sulfur-bearing fossil fuels, which release a high concentration of sulfur oxides in the air.