Draw a graph that represent a production activity of a coal mine in Mpumalanga,and where the air pollution is analysed in the form of coal dust.use hypothetical figures to explain your graph
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Expert's answer
2020-11-25T07:26:04-0500
The specificity of underground coal mining is that for every 1000 tons of mined coal,
the surface is emitted up to 12 kg of coal and rock dust
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