caption: GLASGOW, UNITED KINGDOM - FEBRUARY 15: Schoolchildren take part in a nation-wide student climate march in George Square on February 15, 2019 in Glasgow, United Kingdom.Thousands of UK pupils from schools, colleges and universities will walk out today for a nationwide climate change strike. Students in 60 cities from the West Country to Scotland are protesting, urging the government to declare a climate emergency and take action over the problem. They are keen that the national curriculum is reformed and the environmental crisis is communicated to the public. Similar strikes have taken place in Australia and in European countries such as Belgium and Sweden. (Photo by Jeff J Mitchell/Getty Images)