Which of the following gas is most harmful for plants
$N_2$
$SO_2$
$CO$
$CO_2$
One of the effects of dust is to cause
Which of the following isolation is important for speciation
Soil conservation can be best achieved by having
$A$ : Holistic approach explains the environmental interactions.
$R$ : All environmental factors are integrated with no limits of time and space.
Which one of the following words has been used by Prof. R. Misra for ecosystem