Flashcards For NEET Biology - Environmental Issues

Flashcards for NEET Biology are designed to boost your NEET preparation. Find below flashcards for Environmental Issues. These flashcards on Environmental Issues are prepared as per the NEET syllabus. This is helpful for aspirants of NEET and other exams during last-minute revision. Flashcards For NEET Biology – Environmental Issues, covers all the important points that are frequently asked in the exam. Check BYJU’S for the full set of Flashcards and Study material for NEET Biology. Solve NEET Biology MCQs to check your understanding and outperform in the exam.

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Name of the NEET sub-section

Topic

Flashcards helpful for

Biology

Environmental Issues

NEET exams

 

class 12 environmental issues 1
class 12 environmental issues 2
class 12 environmental issues 3
class 12 environmental issues 4
class 12 environmental issues 5
class 12 environmental issues 6
class 12 environmental issues 7

 

Environmental Issues

Environment (Protection) Act

Passed by Government of India in 1986

To protect and improve the quality of the environment

Electrostatic precipitator

It can remove 99 percent of particulate matter of thermal power plant exhaust

Contains high voltage electrodes

Dust particles get charged with electrons and fall on collecting plates

Scrubber

Used to remove SO2 and similar gases

In this process, the exhaust is passed through water or lime spray

Air (Prevention and Control of Pollution) Act

Passed in 1981

Amended in 1986 to include noise under air pollution

CNG

Compressed natural gas

mainly composed of methane

It burns more efficiently

Water (Prevention and Control of Pollution) Act

Passed in 1974 to protect water bodies

CPCB

Central Pollution Control Board

According to CPCB, particulate matter of size equal or less than 2.5 µm or less is very harmful to humans and can cause respiratory problems

BOD

Biochemical Oxygen Demand

Amount of oxygen required for the complete breakdown of organic matter present in the water sample by aerobic microorganisms

STP reduces BOD of wastewater

Algal bloom

Excessive growth of planktonic algae in water bodies due to the presence of excess nutrients

It leads to water quality deterioration and also releases toxins causing the death of fish and other animals eating them

Biomagnification

Increase in the concentration of toxic substances in each trophic level due to accumulation

E.g. biomagnification of DDT in the aquatic food chain from .003 ppb in water to 25 ppm in birds eating fish. It causes thinning and premature breaking of eggshell

Eutrophication

It is the process of ageing of a lake, whereby it is converted to bog and then to land

It occurs due to the presence of excessive nutrients rich in phosphate and nitrates

Ecological sanitation (EcoSan)

It is a human waste disposal method for reusing human excreta in agriculture

EcoSan toilets are developed in Kerala and Sri Lanka

Polyblend

Recycled and modified fine powder of plastic

Made by Ahmed Khan in Bangalore

Polyblend increases water repellent property of bitumen and when this mixture is laid on a road, it increased the durability of the road three times

Integrated organic farming

It includes maximum utilisation of resources with zero waste and no chemical fertilisers

E.g. Ramesh Chandra Dagar in Sonipat utilises waste products of one process in another simultaneously such as bee-keeping, dairy, composting, agriculture, etc.

Greenhouse effect

The phenomenon responsible for heating the Earth’s surface

Greenhouse gases CO2, CH4 absorb a part of solar radiation and do not allow to escape

Global warming

Increase in the temperature of Earth’s atmosphere due to an increase in the concentration of greenhouse gases

Contribution of gases in global warming-

CO2– 60%, CH4– 20%, CFCs- 14%, N2O- 6%

Montreal protocol

Signed in 1987 and came into effect from 1989

To protect the ozone layer by controlling the use of ozone-depleting substances such as CFCs

Joint Forest Management (JFM)

Conceptualised in 1980 by Government of India

It involves a joint partnership of local communities and forest department in the protection and management of forests

Chipko movement

In 1974, Garhwal Himalayas

Jhum cultivation

A cause of deforestation

Slash and burn agriculture

Commonly practised in North-East states of India

National Forest Policy

Came into force in 1988

According to it, plains should have 33% forest cover and hills 67% forest cover

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