Benefits of greenhouse gas pact may fall short of high hopes

A pact by almost 200 nations to slash greenhouse gases used in refrigerators and air conditioners will likely fall short of governments’ hopes of averting a full half-degree Celsius (0.9 Fahrenheit) of warming this century, scientists say. Michiel Schaeffer of Climate Analytics estimates “around 0.2 degree Celsius (0.36F) by 2100” of avoided warming.