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Name Location Dependent population Description Sources of pollution Impact Bharalu River: Assam, India: One of the most polluted rivers in the state of Assam. [19] The biochemical oxygen demand of the river is 52 mg/L in compared to the permissible limit set by the National River Conservation Directorate (NRCD) at 3 mg/L. [20]
Air pollution can occur naturally or be caused by human activities. [4] Air pollution causes around 7 or 8 million deaths each year. [5] [6] It is a significant risk factor for a number of pollution-related diseases, including heart disease, stroke, chronic obstructive pulmonary disease (COPD), asthma and lung cancer.
Lake Karachay (Russian: Карача́й), sometimes spelled Karachai or Karachaj, was a small lake in the southern Ural Mountains in central Russia.Starting in 1951, the Soviet Union used Karachay as a dumping site for radioactive waste from Mayak, the nearby nuclear waste storage and reprocessing facility, located near the town of Ozyorsk (then called Chelyabinsk-40).
Pollution is the introduction of contaminants into the natural environment that cause harm. [1] Pollution can take the form of any substance (solid, liquid, or gas) or energy (such as radioactivity, heat, sound, or light). Pollutants, the components of pollution, can be either foreign substances/energies or naturally occurring contaminants.
Reports suggest that there are few or no road signs warning about the polluted areas surrounding Lake Karachay. [13] This is exacerbated by historically poor responses to high-level nuclear accidents. Some parts of the lake are extremely radioactive (600 röntgens/hour) and one could receive a lethal dose of radiation in 30 minutes (300 röntgens).
Nigeria has a major problem with pollution, where 78% of air pollution related pneumonia deaths are occurring in children less than five years old. 17. United Arab Emirates. Air quality index ...
Water pollution (or aquatic pollution) is the contamination of water bodies, with a negative impact on their uses. [1]: 6 It is usually a result of human activities. Water bodies include lakes, rivers, oceans, aquifers, reservoirs and groundwater. Water pollution results when contaminants mix with these water bodies. Contaminants can come from ...
Sources of water pollution are either point sources or non-point sources. [155] Point sources have one identifiable cause, such as a storm drain, a wastewater treatment plant, or an oil spill. Non-point sources are more diffuse. An example is agricultural runoff. [156] Pollution is the result of the cumulative effect over time.