2009 Carbon Dioxide Ozone Sea Level 
Columbia Climate Law
MAY 8, 2020
EPA of a 2015 rule barring replacement of ozone-depleting substances with hydrofluorocarbons (HFCs), which are powerful greenhouse gases. Circuit vacated the 2015 rule to the extent that it prohibited continued use of HFCs by companies that previously switched to HFCs from an ozone-depleting substance. In Mexichem , the D.C.
Law Columbia
MARCH 13, 2023
billion tons of carbon dioxide emissions by 2050. In response to the Supreme Court’s decision in Massachusetts , EPA issued its “ Endangerment Finding ” in 2009, which concluded that “six greenhouse gases … taken in combination endanger both the public health and the public welfare of current and future generations.”
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