WASHINGTON (AP) – The Biden administration is launching a wide-ranging plan to reduce methane emissions, targeting a potent greenhouse gas that contributes significantly to global warming. Methane packs a stronger short-term climate punch than even carbon dioxide. The plan was being announced as President Joe Biden wraps up a two-day appearance at a United Nations climate summit in Glasgow, Scotland. It would tighten methane regulations for the oil and gas sector and crack down on leaks from pipelines. A proposed rule would for the first time target emissions from existing oil and gas wells nationwide, rather than focus only on new wells.