Black carbon aerosols and tropospheric ozone, both manmade pollutants emitted predominantly in the Northern Hemisphere's low- to mid-latitudes, are most likely pushing the boundary of the tropics further poleward in that hemisphere.

NEW YORK, April 23, 2012 /PRNewswire-USNewswire/ -- On April 19, before the 2012 Earth Day, the sculpture, "SKY-PATCHING: GODDESS Nuwa," was displayed at Times Square.

The man who first suspected that the Earth's protective ozone layer was being depleted has died at the age of 84-years-old.

The Earth's thinning ozone layer is synonymous with a singing and dancing seagull named Sid -- at least it is in New Zealand and Australia.

The Antarctic ozone hole, which yawns wide every Southern Hemisphere spring, reached its annual peak on Sept. 12. It stretched to 10.05 million square miles, the ninth largest ozone hole on record.