Earth's Future: Scary Ozone Scenario Thwarted

Simulations of global ozone concentration show the real-world ozone layer (left) versus a "world avoided," in which CFCs had never been banned. Reds depict high concentration; dark blues show low concentrations. Note the seasonal pulse of ozone over the poles, how it declines to holes (blue), then becomes global depletion by the 2050s. 2009 shown here. Credit: NASA Goddard's Scientific Visualization Studio

From Live Science:

If 193 nations hadn’t agreed in 1989 to ban the chemicals that eat up the Earth’s protective ozone layer, the world would have been a much different place later this century, with nearly two-thirds of the ozone layer gone and the ozone hole a permanent fixture over Antarctica, a new simulation shows.

Sunburns would occur in a matter of minutes and skin cancer-causing radiation would soar.

Ozone is the Earth's natural sunscreen, absorbing and blocking most of the incoming ultraviolet (UV) radiation from the sun and protecting life from the DNA-damaging rays.

The gas is naturally created and replenished by a photochemical reaction in the upper atmosphere where UV rays break oxygen molecules (O2) into individual atoms that then recombine into three-part molecules of ozone (O3).

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