Atmosphere and Climate Change Crossword Puzzle

QUESTIONS LIST: air pollution : the contamination of the atmosphere by pollutants from human and natural sources, air quality : measuring how clean or polluted the air is, ozone : is produced when sunlight reacts with vehicle exhaust and oxygen in the air, particulate : a tiny particle of solid that is suspended in the air or water, air quality index : is a number used to describe the air quality of a location such as a city, smog : forms when ground-level ozone and vehicle exhaust react in the presence of sunlight, acid precipitation : rain, sleet, or snow that contains acids from air pollution, chlorofluorocarbons : causes the ozone to break down into oxygen, which does not block harmful uv rays, climate : the weather conditions in an area over a long period of time, greenhouse effect : the process by which gases in the atmosphere absorb and radiate energy as heat back to earth, ice age : a long period of cooling, during which ice sheets spread beyond the polar regions, el nino : ocean temperatures are higher than usual in the tropical pacific ocean, la nina : ocean temperatures are cooler than normal in the equatorial eastern pacific ocean, deforestation : the mass removal of trees for farming, timber, and land development, global warming : a gradual increase in average global temperatures, ocean fertilization : a type of climate engineering that reduces global warming, penguins : might be a risk of developing sunburn, skin cancer, or eye damage