Recent questions tagged pollutants

Description : What should we do to adopt 3R strategies for conservation of resources?

Last Answer : I. Reduce By reducing the use of non-biodegradable objects and the resources that are used in their manufacture should be conserved. II. Reuse Secondly, reuse of non-biodegradable objects again ... steels cans, copper wires, etc are collected separately cleaned, melted and moulded into new products.

Description : What is recycling?

Last Answer : In this method, plastic items, glass pieces, aluminum, steels cans, copper wires, etc are collected separately cleaned, melted and moulded into new products. In this way, they are used again and again to reduce pollution.

Description : What types of climatic changes can appear by deforestation?

Last Answer : I. Due to deforestation, the rate of evaporation is reduced which results in less rain. II. Greenhouse effect is increased which results in global warming.

Description : What is deforestation? Explain its effect on wild life.

Last Answer : Destruction of forests due to human activities is called deforestation. Effects I. It destroys habitats of wild life. II. Extinction rate of wild life is increased.

Description : Suggest what can following communities do to reduce air pollution. 1. Students

Last Answer : 1. Students I. By keeping the environment clean II. They can make awareness among people to reduce harmful human activities. III. By planting new plants. 2. Farmers I. By planting more and more trees ... II. Less use of resources must be done. III. Wastage of resources must be stopped and checked.

Description : Point out the sources of air pollutants you find in your locality and suggest ways to reduce the pollution.

Last Answer : Sources of pollutants I. Vehicle's smoke II. Industrial smoke III. CFC in aerosol spray IV. Rotting vegetation Methods to reduce pollution I. Public transport should be used instead of personal cars. II ... from urban areas. IV. CFC free products should be used. V. Deforestation should be avoided.

Description : What is acid rain?

Last Answer : Oxides of Sulphur and nitrogen (SO2 , NO, NO2) react with water vapours in the air and forms acids which make the rain water acidic. Effects I. Acid rain kills the aquatic life in rivers and ponds. ... . III. Acid rain destroys the metals and stones in buildings IV. Crops do not grow in acidic soil.

Description : What is ozone depletion?

Last Answer : A layer in the upper atmosphere is called ozone (O3) layer. It prevents to enter ultraviolet (UV) rays to the earth. These rays are harmful for life. Chlorofluorocarbons (CFCs) react with ... the earth and causes serious diseases like skin cancer, eye problems. II. The temperature is increasing.

Description : What is global warming? Write its effect on earth.

Last Answer : Due to greenhouse effect, the earth’s globe is getting warmer. This is called global warming. Effects I. Ice in the Polar Regions and at the mountains melts, sea level rise and results in flood. II. Climate of the World is changing.

Description : What is greenhouse effect?

Last Answer : When sunlight falls on the earth, a small part of it is absorbed by the earth and is converted to heat energy. A part of this heat energy is reflected back to the atmosphere by ... in the atmospheric temperature. These gases are called greenhouse gases and the phenomenon is called greenhouse effect.

Description : Describe the adverse effect of carbon monoxide on human organ system.

Last Answer : I. It causes headache. II. It causes brain damage and respiratory problems. III. When CO reaches our blood, it gets bonded with hemoglobin and reduced its oxygen carrying capacity.

Description : Sulphur dioxide is an important. From where does it enter the atmosphere?

Last Answer : Sulphur dioxide is produced by burning of coal or oil in factories. Smoke released from thermal power stations usually contain Sulphur dioxide.

Description : How does ozone depletion contribute towards global warming?

Last Answer : UV rays can enter into the earth so the temperature of the earth is increasing and earth globe is getting warmer. This is called global warming.

Description : Name common method used for solid waste management.

Last Answer : I. Landfill II. Incineration III. Recycling

Description : Write down the names of products which are recycled?

Last Answer : I. Glass piece II. Aluminium III. Steels cans IV. Copper wires V. Paper

Description : 3R strategies stand for what?

Last Answer : 3R stands for “Reduce-Reuse-Recycle”

Description : Why ozone layer is important?

Last Answer : Ozone layer prevents to enter ultraviolet (UV) rays to the earth. These rays are harmful for life.

Description : Name the acids which are present in acid rain.

Last Answer : I. Sulphuric acid II. Nitric acid

Description : Name greenhouse gases.

Last Answer : I. Carbon dioxide II. Methane III. Oxides of nitrogen IV. Water vapours

Description : What are the main air pollutants?

Last Answer : I. Carbon monoxide (CO) II. Sulphur dioxide (SO2) III. Oxides of nitrogen (NO & NO2) IV. Chlorofluoro carbons (CFCs)

Description : The problematic pollutants in emission of coal based generating plants __________.  (A) SO₂ (B) NOx (C) CO (D) All of the above

Last Answer : The problematic pollutants in emission of coal based generating plants __________.  (A) SO₂ (B) NOx (C) CO (D) All of the above