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Efficient combustion, flue gas washing and grit arrestors ensured that atmospheric pollution and nuisance were reduced to a minimum, but the size of the works, railway goods yards and coal wharves did little for the environment

If discoloration appears rapidly, worsens quickly, or is accompanied by pain or bleeding, its important to rule out medical causes

[1] Though it may be uncomfortable at first, chest congestion indicates that your body is beginning to repair itself and recover from your smoking habit

Nonetheless, more research should be done to evaluate hookahs effects, which will guide awareness campaigns regarding its negative health outcomes, including those that result from short-term use/exposure