Respuesta :
They burn fossil fuels, which releases huge amounts of sulfur dioxide and nitrogen oxide that pollute the air. ... Two thirds of all sulfur dioxide and more than one third of all nitrogen oxides that pollute the air.
They burn fossil fuels, which releases huge amounts of sulfur dioxide and nitrogen oxide that pollute the air. ... Two thirds of all sulfur dioxide and more than one third of all nitrogen oxides that pollute the air.