Remember when the first studies came out about the Ozone hole? Remember twenty years later, when they said "It appears to be cyclical, so we'll need to study it further"? They noticed something that hadn't been studied much and then reacted to it. I'm all for using natural materials that don't pollute- we don't need stuff that will take hundreds of years to break down in landfills (if it will even break down that soon). However, materials that break down over time often release CO2 and that means recycling can be better (as long as it doesn't create its own problems). Regardless of when we start trying to reverse this, it's a bit late although pollution levels have been dropping since China started cleaning up. If the other countries would do more, I think it could help a lot to slow the temperature increase but one thing needs to be remembered- the increases are small, yet they make a difference.