Mary is campaigning for improved air quality in her city. She is very concerned about carbon and methane outputs, but not phosph
orous. 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.
Carbon dioxide and methane are potent greenhouse gases. They cause heating of the lower atmosphere, by trapping sunlight, that results to climate change. Due to the higher melting and boiling temperatures of phosphorus, it is rare that it occurs as gas in room temperatures. Phosphorus, therefore, does not pose a great threat of climate change.
