What ever happened to the ozone layer? That was the last green scare tactic.

Protection of the ozone layer is a success story thanks to the world adopting the Montreal Protocol to curb the production and emission of ozone depleting substances. The ozone hole, which is really a depletion in levels of ozone over Antarctica, will take some time to fully repair but the big steps have been taken to do this and levels of ozone depleting chemicals are clearly decreasing near the surface. For more information see http://www.theozonehole.com.