pollution

• ozone layer
• global warming
• acid rain
• gas trap the sun's heat
• carbon dioxide - CO2
• car exhaust fumes
• aerosol/spray cans
• CFC- chlorofluorocarbons
• Animals that eat hay and grass, such as cows and sheep, release methane gas as they digest food
• carbon footprint - the amount of carbon that we produce.
• deforestation
• conserve - save
• landfill site
• compost