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MIT scientists just found a hidden problem slowing the ozone comeback
The 1987 Montreal Protocol is often described as the most successful environmental treaty ever created. It has led to a steady global phaseout of chemicals that once damaged the ozone layer and increased risks such as skin cancer.
Summary
The 1987 Montreal Protocol is often described as the most successful environmental treaty ever created. It has led to a steady global phaseout of chemicals that once damaged the ozone layer and increased risks such as skin cancer. Research led by MIT has shown that cutting these ozone-depleting substances is allowing the ozone layer to slowly heal. (It could return to 1980 levels by as early as 2040, according to some estimates.)
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