NEW DELHI (Reuters) - The United States should quickly back its words with actions if, as expected, it rejoins the Paris accord on combating global warming, India’s environment minister said on Friday.President Donald Trump has questioned climate science and withdrew the United States from the 2015 accord, which it formally exited this month. U.S. President-elect Joe Biden has pledged to rejoin the pact and invest $2 trillion to wean his country off planet-warming fossil fuels. “(The) U.S. is welcome but should fulfil its responsibility,” Prakash Javadekar, minister for environment, forest and climate change, told Reuters in response to whether the Paris talks and processes would get fresh momentum with a new U.S. administration in place.