Environmental Science Air and Water Quality Issues 1.) The Greenhouse Effect describes how emitted from the Earth’s surface is trapped in the atmosphere and reflected back towards Earth. 2.) The four main greenhouse gases are: . 3.) The most abundant greenhouse gas is , naturally added to the atmosphere is large numbers by activity. 4.) Carbon dioxide is a waste product of . 5.) A major carbon dioxide sink is . 6.) Refrigerant gases, cleaning solvents, and propellants in aerosol may contain , a greenhouse gas that is 15,000 times more effective than CO2. 7.) The third greenhouse gas, methane, is primarily produced from sources such as certain types of bacteria present in wetlands and the stomachs of cows. 8.) Nitrous oxide is produced mainly by . 9.) Some of the largest concerns regarding global warming are: rising , and more violent . 10.) The ozone layer sits 8-15 miles above sea level in the Earth’s atmosphere. This protective layer absorbs of the % of the UV radiation from the sun. 11.) Once in the stratosphere, CFC molecules can react with and destroy ozone molecules for up to years. 12.) The largest source of carbon monoxide is the . 13.) Very small solid pieces of material which can accumulate in the lungs are called . 14.) NOx reacts with UV light to form . 15.) Ground-level ozone (bad ozone) is a dangerous component of . 16.) In terms of air pollution, the northeastern United States is often thought of as this nation’s . 17.) The two main acids present in acid rain are . 18.) Fish kills, sterile lakes, forest and vegetation decline, and limestone deterioration are all a consequence of .