Smoking and other tobacco use kills more than seven million people each year, the World Health Organization said Tuesday, also warning of the dire environmental impact of tobacco production, distribution and waste.

The UN agency said tougher measures were needed to rein in tobacco use, urging countries to ban smoking in the workplace and indoor public spaces, outlaw marketing of tobacco products and hike cigarette prices. Tobacco, researchers say, exacerbates poverty and reduces economic productivity. In a report released ahead of World No Tobacco Day on Wednesday, WHO warned that the annual death toll of seven million people had jumped from four million at the turn of the century, making tobacco the world’s single biggest cause of preventable death.