India, Jan. 18 -- United States (US) President-elect Joe Biden will begin his term on Wednesday by signing executive orders to return the country to the Paris Climate Agreement (PCA). In a memo, Mr Biden's chief of staff, Ron Klain, noted that the US is facing "four overlapping and compounding crises; the Covid-19 crisis, the resulting economic crisis, the climate crisis, and a racial equity crisis," which "demand urgent action". The Biden administration's decision to return to PCA (the US issued a formal exit notice on November 4, 2019, which took effect on November 4, 2020) reverses one of the most controversial - and damaging - decisions of Mr Biden's predecessor, Donald Trump, a climate sceptic. In the run-up to the election, Mr Biden had promised that one of his priorities would be to build a more resilient, sustainable economy - one that will put the US on an irreversible path to achieve net-zero emissions, economy-wide, by no later than 2050, and also lead an effort to get every major country to ramp up the ambition of their domestic climate targets....