Environmental C...

Stratosphere is a region of the atmosphere which contains

The gas emitted during volcanic eruptions is

Unleaded paint and petrol were introduced because:

Biochemical Oxygen Demand, (BOD) is a measure of organic material present in water. BOD value less than 5 ppm indicates a water sample to be __________.

Catalytic converters must be used in cars to reduce the to reduce the effect of exhaust fumes on the atmosphere. The converter should contain one of the main components

Which of these is not released from burning fossil fuels?

This process in which nutrient enriched water bodies support a dense plant population, which kills animal life by depriving it of oxygen and results in subsequent loss of biodiversity, is called

Chemical species present in the environment are either naturally occurring or generated by human activities. Their interrelation with the surroundings is called:

Which of the following statements is wrong?

Requirement of macronutrient per acre of the land is

Tropospheric pollution is basically due to

Measure of the amount of organic material in the water, in terms of how much oxygen will be required to break it down biologically is termed as

The greenhouse effect is where:

Sewage containing organic waste should not be disposed in water bodies because it causes major water pollution. Fishes in such a polluted water die because of

 Three elements needed for the healthy growth of plants are

Acid rain is

Recycling of materials and energy will lead to

The greenhouse effect is thought to be the cause of:

Which of the following statements about photochemical smog is wrong?

Which of the following is not a secondary pollutant

Sewage containing organic waste should not be disposed in water bodies because it causes major water pollution. Fishes in such a polluted water die because of

Reducing potentially hazardous waste through smarter productions is called

Global warming will not result in:

The gaseous envelope around the earth is known as atmosphere. The lowest layer of this is extended upto 10 km from sea level, this layer is _________.

Residence time of methane in the atmosphere is