A little knowledge goes a long way. The reason the ozone hole didn't become more serious was that scientists researched and found the problem and the policymakers of the world united to ban chlorofluorocarbons. That was the case because scientists were allowed to do their jobs without interference, were taken seriously and the world moved out of enlightened self interest to combat a man caused threat to the world. We need to take scientists researching mass extinction and climate change more seriously as well or what was gained by joining together to mitigate ozone, acid rain and mercury will be lost through politics and willful ignorance.