NEW DELHI (Reuters) - Authorities in India's capital and surrounding areas handed out fines to the owners of thousands of vehicles and construction sites for infringing pollution rules, in a bid to counter a slump in air quality during the last three weeks. New Delhi is the world's most polluted major city, Swiss group IQAir said in its live rankings. Almost 60,000 vehicles and more than 7,500

By Valerie Volcovici WASHINGTON (Reuters) - Failing to curb emissions of nitrous oxide will make it impossible to meet the main goal of the Paris climate agreement to keep global warming to 1.5 degrees Celsius, according to the first major global assessment of the pollutant released on Thursday. WHY IT'S IMPORTANT Nitrous oxide is the third most prevalent greenhouse gas and the worst