What is green house effect ?
Atmosphere traps the sun's heat near the earth's surface and keeps it warm. This is called natural green house effect.
Which of the following are the Green house gases?
$A.$ Water vapour; $B.$ Ozone; $C.$ $I _2$; $D.$ Molecular hydrogen
Choose the most appropriate answer from the options given
Do you observe any soil pollution in your neighborhood? What efforts will you make for controlling the soil pollution?
What is green fuel ?
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 …..
Mention two ways to prevent and rain.
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