EVS - Our Environment
Codes
A B C D
A B C D
7. Which is not a source of air pollution?
- Option : C
- Explanation : There are four main types of air pollution sources:
Mobile Sources Such as automobiles i.e. cars, buses, planes, trucks and trains.
Stationary Sources Such as power plants, oil refineries, industrial facilities and factories.
Area Sources Such as agricultural areas, cities and wood burning firep laces.
Natural Sources Such as windblown dust, wildfires and volcanoes.
8. Which gas is responsible for 'Global Warming'?
- Option : C
- Explanation : Global warming is caused by the emission of greenhouse gases. 72% of the totally emitted greenhouse gases are
• Carbon dioxide (CO2),
• 18% methane and
• 9% nitrous oxide (NOx).
Carbon dioxide emissions, therefore, are the most important cause of global warming.
CO2 is inevitably created by burning fuels like e.g. oil, natural gas, diesel, organic-diesel, petrol, organic- petrol and ethanol.
*/?>
*/?>
*/?>
*/?>