| Define ecological pyramids. Name the different types of ecological pyramids. |
| OR |
| Describe the methods adopted by the Delhi Government to control the vehicular air pollution in Delhi. |
Answer:
An ecological pyramids is a graphic representation of an ecological parameter at different trophic levels of a food chain in an ecosystem.
Ecological pyramids are of there types:
(a) Pyramid of numbers
(b) Pyramid of biomass
(c) Pyramid of energy
OR
Methods of controlling vehicular air pollution in Delhi:
(a) Use of unleaded petrol and low sulphur petrol and diesel.
(b) Use of catalytic converters in vehicles.
(c) Application of Euro III norms for vehicles.
As a result of this air quality of Delhi has significantly improved and there is a substantial fall in the level of sulphur dioxide and carbon dioxide.
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