Biology, 30.01.2020 16:01 jonmorton159

How is the production of mercury from burning coal an environmental hazard?
a. high concentrations of mercury in the air leads to global warming.
b. mercury in water systems is transformed through biological processes into a substance that is toxic to animals.
c. mercury combines with other coal emissions in the air to produce ozone.
d. all of the above

not d ):

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