20 January 2021, Mexico, Mexiko-Stadt: A man pushes his bicycle and a refilled oxygen tank home, where his wife, who has Covid-19, is waiting for him. Due to high demand in the face of very high Corona numbers, Mexico's government called for people to turn in unneeded oxygen tanks. Many people were keeping the often rented containers just in case, even if they were no longer needed, the consumer protection agency said. At the same time, demand has grown exponentially, it said. Mexico has officially registered more than 141,000 deaths related to covid 19 disease since the start of the coronavirus pandemic - the fourth most in the world. Photo: Jair Cabrera Torres/dpa