Select the correct statement regarding conventional chemical farming methods.

  • A
    They kill both harmful and beneficial insect forms.
  • B
    They cause pollution of soil,air,and water.
  • C
    They lead to the problem of biomagnification in the food chain.
  • D
    All of the above.

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Choose the correct option regarding the following statements:
$(1)$ $CO_2$ contribution in global warming is $60\%$.
$(2)$ Greenhouse effect occurs due to deforestation.
$(3)$ Due to the greenhouse effect,the present average temperature at the surface of the Earth is $15^oC$.
$(4)$ The amount of $DDT$ in small fish is $0.05\ ppm$.

In Maharashtra,a $24$ hours toll-free helpline number $1926$ has been set up to provide information regarding:

$5^{th}$ June is celebrated as.....

Assertion: Presently,the global atmosphere is warming up.
Reason: The depletion of the stratospheric ozone layer has resulted in an increase in ultraviolet radiations reaching the earth.

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