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So I'm going to go on and work on preserving the ozone layer, encouraging everyone to recycle.

If you want a higher power, go to the goddamn sun. Just go to the sun - and stop destroying the ozone layer.

The atmosphere is great for people - it allows us to survive - but it's a real headache for astronomers.

When I was a kid, we never heard of smog, ozone depletion, acid rain, green house gasses.

There's so much pollution in the air now that if it weren't for our lungs there'd be no place to put it all.

Approximately 80% of our air pollution stems from hydrocarbons released by vegetation, so let's not go overboard in setting and enforcing tough emission standards from man-made sources.

Climate change and ozone depletion are two global issues that are different but have many connections. In the ozone depletion case, we managed to work with decision makers effectively so that an international agreement called the Montreal Protocol was achieved that essentially solved the ozone depletion problem.

We can't take climate change and put it on the back burner. If we don't address climate change, we won't be around as humans.

We're running the most dangerous experiment in history right now, which is to see how much carbon dioxide the atmosphere... can handle before there is an environmental catastrophe.