Why have scientist tried to reduce pollution?

Pollution has many disadvantages like global warming , greenhouse effect, ozone depletion , melting of icebergs and glaciers at poles which add to the sea water rise and gives rise to floods etc.
Global warming causes increase in earths atmosphere. Then, skin diseases, health decomposition are all caused due to air, water, light (radiation), soil and sound pollution. thus, it is necessary to control pollution.
hence.
Scientists have

tried to reduce pollution