Pollution and Human Impact

• 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'.

Agricultural wastes, including excess pesticides, fertilizers, and animal waste, are significant contributors to soil pollution due to their widespread and intensive application on land.

Solid waste, such as plastics, metals, and chemicals, is primarily dumped on land, leading directly to the contamination of the soil.

Introduction of an undesired component in the natural ecosystem is called as pollution. Wastes like plastic, chemicals, industrial effluents etc., causes damage to the natural micro flora of soil. Due to this soil pollution is lead.

Presence of unwanted contaminant in soil is called soil contamination. Non-biodegradable chemical pesticides are the largest source of soil pollutant.  organo-chlorides are group of insecticides based on chlorinated hydrocarbons (organochlorines).

The definition provided describes the introduction of harmful substances into the soil, which is the standard definition of soil pollution.

Environmental degradation is the process of polluting natural environment. Different methods are being followed to conserve nature. Some of them include:

(i) minimising use water for processing by reusing and recycling it in two or more successive stages 

(ii) harvesting of rainwater to meet water requirements 

(iii) treating hot water and effluents before releasing them in rivers and ponds. Treatment of industrial effluents can be done in three phases 

(a) Primary treatment by mechanical means. This involves screening, grinding, flocculation and sedimentation. 

(b) Secondary treatment by the biological process.

(c) Tertiary treatment by biological, chemical and physical processes. This involves recycling of wastewater. 

Organic and inorganic industrial wastes and effluents discharged into rivers and water bodies causes water pollution.

• Though industrial development in India caused enormous improvement in India’s economy, it also proved disastrous to the environment.
  
• Industries cause air pollution due to the smoke released from factories.
  
• They also cause water pollution due to the draining of industrial wastes into water bodies causing problems to marine and human life.
  
• Industries create high decibel noises paving a way to noise pollution creating anxiety, hypertension especially among old people and patients.
  

• Environmental pollution is caused by many factors one of the main reason is indiscriminate use of resources.  For example excess use of forest products results in deforestation thereby increasing pollution.
  
• Production of hydroelectricity, canal irrigation and plantation agriculture do not cause pollution.
  

Living organisms that respond to the change in environment are called bioindicators. Lichens are useful bioindicators for air and water pollution specially for sulphur dioxide pollution. They are also useful in the detection of toxic elemental pollutants and radioactive metals.

Though industrial development in India caused enormous improvement in India’s economy, it also proved disastrous to the environment.

Industries caused air pollution due to the smoke released from factories.

They also caused water pollution due to the draining of industrial wastes into water bodies causing hectic problems to marine and human life.

Main pollution is caused by chemical industries.

Ground water is one of the important sources for irrigation and drinking. Contamination of ground water by hazardous wastes causes serious environmental effect.

Ground water is often contaminated by man-made products such as gasoline, oil, road salts and chemicals get into the groundwater and cause it to become unsafe and unfit for human use

Ground water mining is the removal, or withdraw, of water from the natural source. Ground water is contained in specific rock units called aquifers.

Ground water mining in the coastal areas is very harmful because when the water is drawn sea water reverses its flow towards the water that is being used and causes an increase in salinity.

Air pollution is defined as the presence of substances in the atmosphere that are harmful to the health of humans, animals, and plants. It involves the contamination of the air by chemical, physical, or biological agents.