Environment pollution is one of the major problems being faced during this period. Wild organisms have a very slow rate of degradation to hazardous materials. Modern science facilitates to approach molecular biology tools to degrade or accumulate hazardous materials from the environment. Due to this, microorganisms adapt themselves and gain the ability to sense and degrade hazardous chemicals from the contaminated sites and allow growing the essential things. In this, these are major problems discussed differently like water pollution, air pollution and many more. Their causes and control effects are in various ways, how to protect our biological life from their major problems.
The addition of undesirable materials into the atmosphere either by natural or man-made activities, which adversely affect the quality of air or hence living beings is called air pollution.
Gaseous air pollution: The constituents that add to air pollution are the oxides of sulfur, nitrogen, carbon, etc. Let us study them in detail.
Oxides of sulfur: Sulfur dioxide (SOâ‚‚) is poisonous to both plants and animals. It causes irritation to the eyes.
Oxides of nitrogen: Nitrogen (Nâ‚‚) and oxygen (Oâ‚‚)do not react at normal temperature. A higher concentration of (NOâ‚‚) is toxic to living tissues and leads to respiratory disease in children.
Carbon dioxide (COâ‚‚): Activities such as burning of fossil fuels, respiration, and decomposition of limestone during manufacturing of cement, etc. lead to the release of excess carbon dioxide in the atmosphere. It is also emitted in large quantities, during volcanic eruptions.
Carbon monoxide (CO): It is produced to due to the incomplete combustion of carbon. It is highly toxic to as it restricts oxygen binding ability of the organs.
Water pollution may be defined as undesirable contamination of water by the foreign substance in such a way that it poses health hazards, directly or indirectly, making the water unfit for consumption, either by industries, in agriculture, or for domestic purposes.
Organic Wastes: These wastes are biodegradable and include leaves, grass, etc. They pollute water due to the presence of dissolved heavy metals.
Chemical Pollution: This pollution is contributed by non-biodegradable substances such as detergents and petroleum products.
Pathogens: These are considered one of the most serious water pollutants. They include bacteria and other organisms that reach underwater from domestic sewage and animal excreta.
Dissolved Oxygen (DO): It is defined as the amount of oxygen that water can hold in the solution is dissolved oxygen. In cold water DO can reach a concentration of 10 ppm. If the concentration of dissolved oxygen (DO) is below 6ppm, the growth of fish gets inhibited.
It is the addition of some chemical substances in an indefinite proportion to the soil system, whereby the fertility of the soil changes. Polluted soil produces inferior quality of crop and that too in low yield. Causes of Soil Pollution: Improperly disposed human and animal excreta, solid and liquid wastes. Industrial wastes dumped on land. Chemical like fertilizers, pesticides and bactericides applied to plants and soils. Pesticides: Pesticides are substances that are utilized to kill or block the reproductive process of unwanted organismsâ€™ .They are synthetic, toxic chemicals. DTDDTD (dichlorodiphenyl trichloroethane): DDT affects the photosynthetic activity of plants. DDT causes softening of brain, cancer, hypertension, malformation of sex hormones, cerebral haemorrhage, etc.
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