A. Answer the following questions in brief :
1. What is Public transport system?
2. "Most rail transit vehicles emit little or no pollution? Give reason.
3. "We should prefer public transport system over single occupancy vehicle.' Give reason.
4. Name any two fossil fuels.
5. Which are the perfect energy resources for the future?
6. What is energy conservation?
7. Why we should replace incandescent bulbs with CFL?
8. What are bio-degradable waste?
9. Name any two clean energy resources.
10. What is Organic Farming?
11. "Modern agricultural techniques are not environment friendly." Give reason.
12. Name any two bio-pesticides.
13. What is green manuring?
14. What are advantages of farmyard manure ?
Answers
Answer:
1)Public transportation is a form of travel offered locally that enables more people to travel together along designated routes. Typical examples of types of public transportation include buses, trains, and trams. High-speed rails, airlines, and coaches dominate public transportation between cities.
2) seeRail transport is the most environment-friendly way to travel. The greenhouse effect of gas emissions per kilometer on railway transport is 80% less than cars. In some countries, less than 3% of all transport gas emissions come from trains.
3)By moving people more efficiently, public transit produces significantly less air pollution per passenger mile than a standard car carrying a single driver. Buses emit 20% less carbon monoxide, 10% as much hydrocarbons, and 75% as much nitrogen oxides per passenger mile than an automobile with a single occupants.
4)Coal, oil, and natural gas are examples of fossil fuels. Coal is a material usually found in sedimentary rock deposits where rock and dead plant and animal matter are piled up in layers
5)Atomic energy, solar energy, and energy from wind and bio fuels are just a few of the promising alternatives for a cleaner and greener future. Other relatively new sources of energy such as fuel cells, geothermal energy, and ocean energy are also being explored
6)Energy conservation is the decision and practice of using less energy. Turning off the light when you leave the room, unplugging appliances when they're not in use and walking instead of driving are all examples of energy conservation.
7)Pros of CFLS
Longevity—With an average lifespan of approximately 10,000 to 15,000 hours, a CFL bulb lasts about ten times longer than an incandescent bulb—which means they need to be replaced less often, making them convenient for those hard-to-reach light fixtures and lamps.
8)A biodegradable material can be defined as a material which can be decomposed by bacteria or other natural organisms and not be adding to pollution. ... Some examples of such wastes are food materials, kitchen wastes, and other natural wastes.
9)Clean Energy Sources
Solar Energy. Our beautiful bread and butter, solar energy. ...
Wind Energy. Another clean energy source, wind energy is technically another form of solar energy since the sun is partly responsible for all weather patterns on Earth. ...
Bioenergy. ...
Geothermal Energy. ...
Hydropower. ...
Nuclear Energy. ...
Natural Gas.
10)Organic farming is an agricultural system which originated early in the 20th century in reaction to rapidly changing farming practices. Certified organic agriculture accounts for 70 million hectares globally, with over half of that total in Australia.
12)The most commonly used biopesticides are living organisms, which are pathogenic for the pest of interest. These include biofungicides (Trichoderma), bioherbicides (Phytopthora) and bioinsecticides (Bacillus thuringiensis). There are few plant products also which can now be used as a major biopesticide source.
13) Green manuring is the practice of incorporation of undecomposed fresh/dry plant material into soils, both either in place or brought from a distance (Pieters 1927). In addition to this, green manure legume crops also fix atmospheric N biologically. ... 2011) during crop growth as well as after decomposition
14)Farmyard manure improves the soil structure and is used as a natural fertilizer in farming. It increases the soil capacity to hold more water and nutrients. It also increases the microbial activity of the soil to improve its mineral supply and also the plant nutrients.