A new assessment says the ozone layer will recover to 1980 values by 2066 over Antarctica; in Artic by 2045. Success of Montreal Protocol is noteworthy, but phasing out greenhouse gases is more difficult.
Author: Amitabh Sinha
At a major international conference, countries have resolved to take steps towards arresting the Great Extinction — the existential threat that a million or more species face if urgent action is not taken. The problem is that these targets are not new — and they have proven extremely hard to meet.