President Joe Biden on Thursday vowed to cut U.S. greenhouse gas emissions by 50 percent from 2005 levels by 2030. Biden will officially announce the new target during a virtual summit with 40 world leaders, including the heads of China and Russia, the White House announced. The new target essentially doubles the previous goal, established under former President Barack Obama in 2015 when he entered the United States into the Paris climate agreement. The new target “is part of the President’s focus on building back better in a way that will create millions of good-paying, union jobs, ensure economic competitiveness, advance environmental justice, and improve the health and security of communities across America,” the White House said. Former President Donald Trump removed America from the climate pact, choosing a different path towards sustainability. Emissions dropped during Trump’s time in office, but some believed the decrease was too small and have …