A cold snap in northern oceans around 1970 may have caused a dip in world temperatures that briefly interrupted a trend of global warming, scientists said on Wednesday. Many experts had previously explained a slight global cooling around 1970 as a side-effect of a slow build-up of sun-dimming air pollution from factories, power plants and…

The world should safeguard coral reefs with networks of small no-fishing zones to confront threats such as climate change, and shift from favoring single, big protected areas, a U.N. study showed. “People have been creating marine protected areas for decades. Most of them are totally ineffective,” Peter Sale, a leader of the study at the…

Afghanistan and nations in sub-Saharan Africa are most at risk from shocks to food supplies such as droughts or floods while Nordic countries are least vulnerable, according to an index released on Thursday. “Of 50 nations most at risk, 36 are located in Africa,” said Fiona Place, an environmental analyst at British-based consultancy Maplecroft, which…

Some of Russia’s smog-causing peatland fires are likely to burn for months, part of a global problem of drained marshes that emit climate-warming greenhouse gases, experts said on Wednesday. Novel carbon markets could offer a long-term fix for peat bogs, from Indonesia to South Africa, if negotiators of a U.N. climate treaty can agree ways…

Smoke from forest fires smothering Moscow adds to health problems of “brown clouds” from Asia to the Amazon and Russian soot may stoke global warming by hastening a thaw of Arctic ice, environmental experts say. “Health effects of such clouds are huge,” said Veerabhadran Ramanathan, chair of a U.N. Environment Programme (UNEP) study of “brown…

Rich and poor nations alike criticized a new blueprint for a U.N. climate treaty on Friday as two weeks of talks among 185 countries ended with small steps toward an elusive deal. A streamlined climate draft, meant to help talks on a new pact, cut out some of the most draconian options for greenhouse gas…