If there was no green house effect:
1. | Earth would have been too cold for many organisms to survive |
2. | The diversity on Earth would have been much higher |
3. | The primary productivity would have been much higher |
4. | Earth would not have any atmosphere |
In India, the name Ramesh Chandra Dagar, is associated with:
1. Organic farming
2. Conservation of forests
3. Recycling of plastic wastes
4. Preservation of water lands
Burying radioactive wastes is not acceptable to many people as:
1. there is a risk of groundwater contamination
2. it may explode
3. it will harm the buried dead bodies
4. it may get accumulated in vegetations
It is necessary to remove sulphur from petroleum products to
1. | reduce the emission of sulphur dioxide in exhaust fumes |
2. | increase efficiency of automobiles' engines |
3. | use sulphur removed from petroleum for commercial purposes |
4. | increase the life span of engine silencers |
Compressed Natural Gas (CNG) is:
1. | Propane | 2. | Methane |
3. | Ethane | 4. | Butane |
Arcata Wildlife Sanctuary in Arcata, California is also a/an:
1. innovative sewer management system
2. tiger reserve
3. nuclear waste disposal site
4. ecological hotspot
Biomagnification can occur as a result of:
I: | Persistence |
II: | Food chain energetics |
III: | Low or non-existent rate of internal degradation or excretion of the substance |
1. | I and II only | 2. | I and III only |
3. | II and III only | 4. | I, II and III |
Hot wastewater discharged from industries into water bodies:
1. | increases the nutrient content of the water body |
2. | decreases the BOD of water |
3. | is considered a water pollutant |
4. | is desirable as cool water is more damaging to aquatic life |
A substance or energy introduced into the environment that has undesired effects, or adversely affects the usefulness of a resource is called:
1. | Pathogen | 2. | Allergen |
3. | Pollutant | 4. | Secondary metabolite |
Radiatively active gases do not include:
1. Methane
2. Ammonia
3. Nitrous oxide
4. Chloroflouro carbons