The addition of fertilizers is frequently required in agricultural lands but not in wild mainly because:

1.	nitrogen-fixing bacteria and detrivores are less potent in agricultural lands.
2.	the nutrients that enter the plants are not returned to the soil on lands where they are harvested.
3.	the agricultural lands are selected for their oligotrophic soils.
4.	cultivation of agricultural lands inhibits the decomposition of organic matter.

What is most likely to occur due to continued global warming?

Kyoto protocol commits signatories to:
1. Plant more trees
2. Cut forests for agriculture
3. Increasing nitrogen oxides into the atmosphere
4. Increasing the amount of methane in the atmosphere

Identify the incorrectly matched pair:

The radiatively active gas with the maximum percent increase in the atmosphere since 1750 AD is:

Non-biodegradable pollutants are created by:
1. Nature
2. Excessive use of resources
3. Humans
4. Natural disasters

The material generally used for soundproofing rooms like a recording studio or an auditorium is:

The world’s most problematic aquatic weed is:

Which of the following exhibits biomagnifications?

The expanded form of DDT is:
1. Dichloro diphenyl trichloroethane
2. Dichloro diethyl trichloroethane
3. Dichloro dipyridyl trichloroethane
4. Dichloro diphenyl tetrachloroacetate