Page 43 - EM BIOLOGY NOTES 10TH CLASS PSR DIGITAL BOOKS

ENVIRONMENTAL SCIENCE

A. GLOBAL WARMING
Lesson related 1, 2, 4 marks
1. Greenhouse gases / Earth heating Gases Activities Question and
a) Carbon dioxide (CO ) videos Answers PDF
2 pl.scan QR pl.scan QR
b) Nitrogen dioxide (NO )
2
c) Chlorofluorocarbons (CFC)
d) Hydrocarbons
e) Methane (CH )
4
2. Excess presence of these gases in the atmosphere causes global warming.
3. These gases are released into atmosphere from factories, chemical industries, air
conditions (AC), refrigerators, burning of waste materials (papers, plastic, tires etc.,)
4. Precautions :
a) Reducing the use of incandescent bulbs.
b) Minimize the time period of usage of refrigerators.
c) Do not burn the waste, turn into compost manure by using earthworms.
d) Minimize the usage of fossil fuels.
e) Stop deforestation, start plantation.
B. SAVIORS OF OUR ENVIRONMENT
1. Environmentalism includes
a) Conservation of natural resources
b) Prevention of Pollution
c) Sustainable use of land
2. Our environmentalists
a) Sundarlal Bahuguna - CHIPKO movement and
Anti - Tehri dam movement
b) Medhapatkar - Narmada bachao movement
3. Environment - our concern
a) Saving a tree from cutting
b) Growing of trees /plants in the school compound
c) Giving medical assistance to a suffering dog or a bird.
d) Keep surrounding clean and green.
e) Preventing entering of waste materials into the pond or pool etc. are part of
environmental movement.
C. PARTICULATE POLLUTANTS IN AIR :
1. Solid particles and liquid droplets present in air are called particulate pollutants.
Example :- Pollen grains, Spores, Dust in smoke and vehicular exhaust, Fly ash, Coal dust,
Cement and Mist etc.
2. Problems :
a) Reduce visibility
b) Various respiratory diseases (asthma)
c) Increases global warming
d) Allergie
D. VACCINATION :
1. Vaccination protect ourselves from Diphtheria, Whooping cough, Tetanus, Cholera,
Hepatitis, Polio.
2. By using vaccination we eradicate small fox.

TEACHER AND STUDENT PUBLICATIONS, ONLY 10TH CLASS (92) PSR DIGITAL BOOKS (ONLINE&OFFLINE), ALL SUBJECTS (TM&EM) 9885678410