Manipur, June 12 -- Pollution and greenhouse gas emissions have fallen across continents as countries try to contain the spread of the new coronavirus. Is this just a fleeting change or could it lead to longer lasting falls in emission? In matter of months, the world has been transformed. Thousands of people have already died and hundreds of thousands more have fallen ill from a coronavirus that was previously unknown before appearing in the city of Wuhan in December 2019. For millions of others who have not caught the disease, their entire way of life has changed by it. The streets of Wuhan, China are deserted after authorities implemented a strict lockdown. In Italy, the most extensive travel restrictions are in place since World War-II...