BERLIN (AP) — World leaders have breathed an audible sigh of relief that the United States under President Joe Biden is rejoining the global effort to curb climate change, a cause that his predecessor had shunned. British Prime Minister Boris Johnson and French President Emmanuel Macron were among those welcoming Biden’s decision to rejoin the the Paris climate accord. The treaty, forged in the French capital in 2015, commits countries to put forward plans for reducing their emissions of greenhouse gases such as carbon dioxide, which is released from burning fossil fuels. Former President Donald Trump had questioned the scientific warnings about man-made global warming, at times accusing other countries of using the Paris accord as a club to hurt the U.S.