Reuters: Beijing welcomed U.S. promises of more action to slow global warming on Monday and said China would also do its share while ensuring that its people were not “left in the dark” without electricity. “We welcome this positive change in attitude and approach by President (Barack) Obama and his team,” China’s climate ambassador Yu Qingtai said on the sidelines of 175-nation U.N. climate talks from March 29-April 8 in Bonn. The Obama administration made its U.N. climate debut at the …