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Engineers controlling a quality of water ,aerated activated sludge tank at a waste water treatment plant
An oil slick against the backdrop of an asphalt road flows into a storm drain through a grate. Environmental problems of water pollution.
Air pollution from car exhaust smoke traffic in the city. Reducing global warming pollution and carbon dioxide from engine combustion.
Working factory. Smoke from the factory chimney. Ecological pollution. Air emissions polluting the city. Industrial waste is hazardous to health. Large factory in smog, Production in operation.
Air pollution vector illustration. Natures tears fall as we pollute air, lifeblood our fragile ecosystem The air pollution metaphor is stain, mark shame on canvas environmental ethics

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