From Our Own Correspondent

Relations between the US and China are going through a rough patch. On trade, diplomacy and military matters the superpowers are at odds; they still have entirely different visions of the world and its future. Yet the world’s two biggest carbon emitters have pledged to cooperate more closely on cutting their emissions. Celia Hatton explores how the promises were hammered out and what it means for the rest of the planet.; Early in 2021 many hoped India might escape the worst of the pandemic, with a vaccine roll-out under way and infection rates dropping. But Covid cases and deaths have soared. The surge in patient numbers, and severe shortages of oxygen, have overwhelmed the health system in some places. In Delhi, Rajini Vaidyanathan sensed a marked shift in mood.; Brazil is also hard hit. Its President Jair Bolsonaro has scoffed at the virus, and clashed repeatedly with regional governors who wanted to impose stricter lockdowns and other measures. In the northeastern town of Lencois, Richard Lapper gauges the