How did the depletion of ozone layer has created in the atmosphere over the Antarctica Explain with reactions.
A large number of fish are suddenly found floating dead on a lake. There is no evidence of toxic dumping but you find an abundance of phytoplankton. Suggest a reason for the fish kill.
Summarize the quantities and differentiated quantities of different metals and ions at the international level of drinking water.
What is smog? How is classical smog different from photochemical smogs ?
What is environmental pollution ?