Give the names of green house gases.
Carbon dioxide, methane, ozone, chlorofluoro-carbon compounds and water vapour are the green house gases.
What are pesticides and herbicides ? Explain giving examples.
Do you observe any soil pollution in your neighborhood? What efforts will you make for controlling the soil pollution?
Fill in the Blanks :
$(1)$ The substance that spreading pollution is called …….
$(2)$ The fullform $DDT$ is …….
$(3)$ The area of $10\, km$ to $50\, km$ from the sea level is called ………
$(4)$ Harmful ultraviolet sun radiation come to the earth is blocked by …..
How the nitrogen oxide is made ? and How the excessive amount of nitrogen oxide is harmful ?
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.
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