Air Pollution

noun a combustible black or dark brown rock consisting chiefly of carbonized plant matter, found mainly in underground deposits and widely used as fuel

• Coal is a fossil fuel that is commonly used for electricity generation.
• My grandfather used to work in the coal mines when he was younger.
• I'm so tired, I feel like I've been coal mining all day.
• His heart was as black as coal after what he did.

noun a solid particle produced during incomplete combustion of fossil fuels, biofuels, and biomass

adjective describing the color and composition of the carbon particle

• Black carbon is a type of particulate air pollution that is released from burning fossil fuels.
• Hey, did you know that black carbon is a major contributor to global warming?
• I heard that black carbon is like the bad boy of air pollution, causing all sorts of trouble.
• The presence of black carbon in the atmosphere is like a dark cloud hanging over our environmental efforts.