Tag: waste and its management

Soil pollution is caused by the addition of substances and factors which decrease its productivity. It is caused by agrochemicals, industrial wastes, municipal wastes etc. It adversely affects the fertility of the soil. The industrial waste lingers in the soil surface for a long time and makes it unsuitable for use by changing the pH of the soil. Pesticides and herbicides are used in agricultural practices and these chemicals penetrate into the soil and change the pH of the soil, affecting its fertility.

Acid rain is the secondary effect of air pollution. The gases like sulphur dioxide and nitrogen oxide when in high concentration in the air, mix with the air moisture in clouds and form sulphuric and nitric acids. These acids come down to the earth in the form of acid rain-causing much damage to the living organism and buildings. Acid rain pollutes water and soil both. When the rain droplets get mixed with nitrogen and sulfur oxide it causes acid rain. this acid rain when fall on earth reacts with soil because of chemicals present in acid rain, the fertility of particular area gets affected.

• Paint is any pigmented liquid, liquefiable, or mastic composition that, after application to a substrate in a thin layer, converts to a solid film. It is most commonly used to protect, colour, or provide texture to objects.
• Soil pollution is defined as the presence of toxic chemicals (pollutants or contaminants) in soil, in high enough concentrations to pose a risk to human health and/or the ecosystem.
  
• Paints consist of heavy metal pollutants which when mixed with soil causes soil pollution.
• Hence Paint is the industrial sources of soil pollution.
• So, the correct answer is 'Paints'.

• Soil pollution is defined as the presence of toxic chemicals (pollutants or contaminants) in soil, in high enough concentrations to pose a risk to human health and/or the ecosystem.
• Sources of soil pollution include Pesticides, Biomedical Wastes, Industrial Wastes, improper disposal of waste, etc.
• So, the correct answer is 'None of the above'.

Soil pollution is alteration in soil caused by removal or addition of substances and factors, which decrease its productivity and quality of plants and ground water. Negative soil pollution is reduction in soil productivity due to erosion and over use. Positive soil pollution is reduction in soil productivity due to addition of undesirable substances e.g., agrochemicals, industrial wastes, air pollutants washed down by rain, faulty sanitation etc. Pesticides and fertilisers are the two most important types of agrochemicals.