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The history of environmental pollution traces human-dominated ecological systems from the earliest civilizations to the present day. [1] This history is characterized by the increased regional success of a particular society , followed by crises that were either resolved, producing sustainability , or not, leading to decline.
Air pollution control system, known as a thermal oxidizer, decomposes hazard gases from industrial air streams at a factory in the United States. A dust collector in Pristina, Kosovo. Pollution control is a term used in environmental management. It refers to the control of emissions and effluents into air, water or soil.
A World Bank study found that PM 2.5 pollution in 2019 cost the world economy over $8 trillion, which was over 6% of global GDP. They suggested prioritising reducing pollution from diesel fuelled vehicles and coal-fired power plants. [199]: ix The problem is most acute in the developing world. "Children under age 5 in lower-income countries are ...
As all history occurs in the natural world, environmental history tends to focus on particular time-scales, geographic regions, or key themes. It is also a strongly multidisciplinary subject that draws widely on both the humanities and natural science. The subject matter of environmental history can be divided into three main components. [2]
Air pollution is associated with an estimated 7 million premature deaths each year. WHO guidelines recommend exposure to no more than an annual mean PM2.5 concentration of 5 micrograms per cubic ...
A pollutant or novel entity [1] is a substance or energy introduced into the environment that has undesired effect, or adversely affects the usefulness of a resource. These can be both naturally forming (i.e. minerals or extracted compounds like oil) or anthropogenic in origin (i.e. manufactured materials or byproducts).
Water pollution also reduces the ecosystem services such as drinking water provided by the water resource. Sources of water pollution are either point sources or non-point sources. [156] 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.
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]