9G+Key+Terms

9G Cleaning up

9G Key Terms

 * acid rain || computer model || monitor || pollution ||
 * air quality || corrode || natural pollutant || respiration ||
 * carbon dioxide || fossil fuels || neutralise || starch ||
 * catalytic converter || global warming || nitrogen oxides || sugar ||
 * chemical weathering || greenhouse effect || pH || sulphur dioxide ||
 * climate change || greenhouse gases || photosynthesis || sulphur precipitator ||
 * combustion || ice core || pollutants || vitamin ||