Students take part in a rally to call for actions against climate change in Kathmandu, Nepal, Sept. 20, 2019. (Photos: Xinhua)

A student holds a placard while taking part in a rally to call for actions against climate change in Kathmandu, Nepal, Sept. 20, 2019.

Students take part in a rally to call for actions against climate change in Kathmandu, Nepal, Sept. 20, 2019.