UNITED NATIONS — Russia’s “illegal, unprovoked” and “cruel” war against Ukraine is underscoring the many different ways in which peace, security and a stable climate are linked, U.S. climate envoy John Kerry said Wednesday. Kerry told an informal U.N. Security Council meeting on...

When fighting from Russia’s invasion of Ukraine resulted in power cuts to the critical cooling system at the closed Chernobyl nuclear power plant, some feared that spent nuclear fuel would overheat. But nuclear experts say there’s no imminent danger because time and physics are on safety's...

WELLINGTON, New Zealand — New Zealand lawmakers have unanimously passed a bill to impose economic sanctions on Russia. Unlike many countries that had already imposed sanctions, New Zealand’s laws didn’t previously allow it to apply meaningful measures unless they were part of a broader...

Two million people — half of them children — have fled Ukraine in the less than two weeks since Russia invaded the country, officials said Tuesday, as Europe's worst refugee crisis since World War II grows by the day. As the cross-border exodus from Ukraine continued, the humanitarian...