Swedish climate activist Greta Thunberg, centre with back to camera, arrives for a three-day Youth for Climate summit in Milan, Italy. People camp overnight to receive a Covid-19 vaccine at a government-run hospital in Siliguri, India. Moroccan street artist Omar Lhamzi works on a mural during the Jidar street art festival in Rabat. A hungry polar bear looks for food along the shore near Pyramiden, Svalbard, a Norwegian archipelago. Republican Guards greet Greek Prime Minister Kyriakos Mitsotakis ahead of a meeting with France's President Emmanuel Macron in the Louvre, Paris. A tractor harvests a vineyard at sunrise in Chablis, France.