PhysOrg: China, from 2015 the world's biggest economy, is its worst polluter already now. It has not yet, but will be most probably climbing the top position also with regards the aggregate contribution to climate change (historical emission residues included), called the climate debt. At the same time, it is the largest victim of environmental change, and the leading country in cleaning-up the environmental mess - the government has taken bold steps towards improvement. Could the largest polluter become...