Environmental Issues Biology Quiz for NEET

Polyblend is fine powder of recycled plastic waste that after mixing with bitumen, used to lay roads.

To control the deleterious effect of the stratospheric ozone depletion an international treaty was signed at Montreal, Canada in 1987.

Storage of nuclear waste should be done in suitably shielded containers and buried within rocks deep below the earth’s surface (500 m deep)

UV rays act on CFCs, releasing Cl atoms, chlorine reacts with ozone in sequential method converting into oxygen

Carbon, oxygen and Fe are not related to ozone layer depletion

O3 (ozone) is a secondary pollutant. These are formed by the reaction of primary pollutant.

CO – Quantitative pollutant

CO2 – Primary pollutant

SO2 – Primary pollutant

Micro-organisms involved in biodegradation of organic matter consume oxygen as a result there is a sharp decline in oxygen causing mortality of fish and other aquatic creatures.

Maximum DDT concentration occurs in fish eating birds like Seagull due to biomagnification. This happens because a toxic substance accumulated by an organism cannot be metabolised or excreted, thus passed to higher trophic level.

A river with an inflow of domestic sewage rich in organic waste will reduce the dissolved oxygen (DO) and may result in death of fish due to lack of oxygen.

Joint Forest Management Concept was introduced in India during 1980s by the Government of India to work closely with the local communities for protecting and managing forests.

BOD level increases due to rapid growth of microbes.

indirect measure of the organic matter present in the water.

Unwanted sound is called noise and it is measured in terms of decibels (dB). Generally sound above 80 dB is noise.

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