The U.S. Department of Energy announced new regulations on Thursday for home air conditioning units, portable air cleaners, and window air conditioners to "reduce [the] nation's carbon footprint." The department said the regulations are part of President Joe Biden's efforts toward "tackling the climate crisis." "[Thursday's] announcement builds on the historic actions President Biden took last year to strengthen outdated energy efficiency standards, which will help save on people's energy bills and reduce our nation's carbon footprint," Energy Secretary Jennifer Granholm said. "DOE will continue to engage with our public and private sector partners to finalize additional proposals like today's...