Environmental groups are threatening to sue the Trump administration over its move to rescind regulations on methane emissions at oil and gas plants. On Thursday, the Environmental Protection Agency put forward a new rule to overturn regulations put in place by President Obama. According to the EPA, the rule will save energy companies up to $123 million through 2025. But environmental groups warn the change could have a devastating impact on the climate crisis. Methane has more than 80 times the heat-trapping potential of carbon dioxide.