Disasters repeatedly appeared throughout 2021. Flash floods and landslides occurred in Indonesia, especially East Nusa Tenggara, which has claimed hundreds of victims and lost more than Rp. 24,409,100,000. And also, in another country, an unexpected catastrophe occurred. Extreme rains and storms have caused flash floodsin Germany and Belgium. Later heatwaves have resulted in wildfires in Greece, United States, Canada, and Australia.

Thirty-four years ago, the Montreal Protocol on efforts to reduce "Substances that Deplete the Ozone Layer" was agreed. This meeting originated from scientists' findings in the late 1970s related to the emergence of a large hole in the earth's ozone layer.