Select the correct answer.
mary is campaigning for improved air quality in her city. she is very concerned about carbon and methane outputs, but not phosphorous. why is that?
a.
she thinks phosphorous makes a positive contribution to air quality.
b.
phosphorous is most commonly found as phosphate rock.
c.
she doesn’t know a lot about phosphorous.
d.
she doesn’t consider phosphorous to be a greenhouse gas.