Given below is a representation of type pollution. Study the picture and answer the question. State one gaseous compound that leads to the depletion of the ozone layer and creates 'Ozone holes'.

The contamination of air by harmful gases, dust and smoke that affects plants, animals is called air pollution. The effects of air pollution are global warming, acid rain, etc. The ozone layer is a region of Earth's stratosphere that absorbs harmful ultraviolet radiation. The gaseous compound that leads to the depletion of the ozone layer and creates 'Ozone holes' is called chlorofluorocarbons.

Study the picture given below and answer the following question: Identify the type of pollution.

The contamination of water bodies usually caused due to human activities is called water pollution. The type of pollution shown in the given image is water pollution. The causes of water pollution are domestic waste, industrial effluents, insecticides, pesticides and detergents, fertilizers. As these pollutants get mixed with the water the aquatic animals will not get sufficient oxygen gas for respiration which ultimately leads to the death of aquatic animals.

Study the picture given below and answer the following question: Name one pollutant that causes the above pollution.

The contamination of water bodies usually caused due to human activities is called water pollution. The causes of water pollution are domestic waste, industrial effluents, insecticides, pesticides and detergents, fertilizers. As these pollutants get mixed with the water the aquatic animals will not get sufficient oxygen gas for respiration which ultimately leads to the death of aquatic animals.

Give the biological reasons for the following statement: Water pollution is a major cause of concern in our country.

The addition or introduction of unwanted or undesirable contaminants into the water is called water pollution. It is caused due to improper disposal of sewage, oil spills and water coming from the industries. Industrial waste is discharged into lakes and rivers by using fresh water making the water contaminated. Water pollution increases the biological oxygen demand of the water.

Mention any two objectives of ‘Swachh Bharat Abhiyan’.

Swachh Bharat Abhiyan is to spread the awareness of cleanliness and its importance. The idea of Swachh Bharat Abhiyan is to provide basic sanitation facilities like toilets, solid and liquid waste disposal systems, village cleanliness, and a safe and adequate drinking water supply to every person.

Give suitable biological reasons for the given statement: Acid rain is harmful to the environment.

The acid rain falls through polluted air, it comes across chemicals such as gaseous oxides of sulphur, oxides of nitrogen(this gas is 78% in atmosphere), mists, of hydrochloric acid and phosphoric acid etc. Its pH lowers from 5.6 to 3.5 sometimes it becomes as low as 2. The effects of acid rain can be seen on crops, trees, and many resources this can destroy the livelihood of many people. Many people get affected by acid rain directly but indirectly. It destroys the shades of the marbles for example Taj Mahal got destroyed by acid rains.