“Burning fossil fuels is a cause of global warming.” Justify this statement. [Delhi]
Fossil fuels like coal and petroleum are formed from biomass. In addition to carbon, they contain hydrogen, nitrogen and sulphur. When fossil fuels are burnt, the products are carbon dioxide, water vapour, oxides of nitrogen and oxides of sulphur. Carbon dioxide is a greenhouse gas. Increase in the percentage of carbon dioxide increases the temperature on earth which leads to global warming.
Why must we conserve our forests? List any two causes for deforestation to take place. [Delhi]
Name the products of combustion of fossil fuels like coal and petroleum products. How do they affect us and our environment ?
(a) What is a natural resource ? Name three important natural resources.
(b) Why do we need to manage our natural resources ?
State two changes you can make in your habits to reduce the consumption of electricity or water. [All IndiaiC)]
State the meaning of “sustainable management”. Reuse is better than recycling. How? [Foreign]
(a) Name the major industries which are based on forest produce.
(b) State the main aim of the management of forests and wildlife.
(c) Name the four main stakeholders in the management of forest resources.
What is an equitable distribution of resources in a society and why is it necessary? State any two factors which work against an equitable distribution of resources. [Foreign]
What is the name of the process in which rainwater falling on the earth is stopped from flowing and made to percolate into the ground ?
Choose one term from the following which include all others :
coal, natural gas, fossil fuels, petroleum
Give one example to show how the participation of local people can lead to the efficient management of forests.
Fill in the following blanks with suitable words :Fill in the following blanks with suitable words :
(a) LPG is a ……………fuel but biogas is not a…………. fuel.
(b) Glaciers are a source of…………………..
(c) One of the main aim of management of forests and wildlife is to conserve the……………….which we haveinherited.
(d) Khadin is a traditional………………………..harvesting system in Rajasthan.
(e) When a fuel burns in an insufficient supply of air, then some poisonous gas called ……………………….. is also produced.
What are non-renewable resources of energy? Give two examples of such resources. [Delhi]
Give two examples each of the following:
Why are forests considered “biodiversity hot spots”? List two ways in which an individual can effectively contribute to the management of forests and wildlife. [Foreign; All India 2010]
(a) What is meant by rainwater harvesting ? Name some of the ancient structures used for rainwater harvesting by the rural people.
(b) What are the various advantages of water stored in ground ?
(a) Locate and name the water reservoirs in figures (a) and (b).
(b) Which has an advantage over the other and why?
Although coal and petroleum are produced by degradation of biomass, yet we need to conserve them. Why?
State an instance where human intervention saved the forests from destruction. [Delhi(Q)]
List any four disadvantages of using fossil fuels for the production of energy. [All India]
Explain briefly, how rainwater harvesting is done from open spaces around the buildings in city areas.
In the context of conservation of natural resources, explain the terms reduce, recycle and reuse. From among the materials that we use in daily life, identify two materials for each category.
Why do you think there should be equitable distribution of resources? What forces would be working against an equitable distribution of our resources?
List any two causes of our failure to sustain availability of underground water.[Foreign]
What is meant by exploitation of resources with short-term aims? List its four advantages. [Delhi(C)]
Name the person who is most remembered for the protection of Khejri trees in Rajasthan.
In a village in Karnataka, people started cultivating crops all around a lake which was always filled with water. They added fertilisers to their field in order to enhance the yield. Soon they discovered that the water body was completely covered with green floating plants and fishes started dying in large numbers. Analyse the situation and give reasons for excessive growth of plants and death of fish in the lake.
How would these advantages differ from the advantages of using a long-term perspective in managing our resources?