On Science
2007-05-30 15:37:59 · 4 answers · asked by Datgurlie 1 in Science & Mathematics ➔ Earth Sciences & Geology
1. Autos, and other modes of transportation.
2. Coal burning for electrical power.
3. Industrial pollution.
4. Dust
5. Pollen
2007-05-30 15:49:24 · answer #1 · answered by Kevin k 7 · 2⤊ 1⤋
The number one source is methane such as produced by cattle. People are aiding this one by increased cattle production, Also, other man-made ones are gases from burning (gasoline, wood, coal, those used for air conditioners and those used for propellants, etc.); dust (from meteor strikes, volcanic eruptions, human activities, etc); fires that are natural in origin; carbon dioxide over production while deforestation is going on.
2007-06-03 14:21:35 · answer #2 · answered by kitnsass 2 · 0⤊ 0⤋
Ummm...there are way more than five. Here goes: combustion-fired power plants, controlled burning, motor vehicles, marine vessels, burning stuff in general, oil refining, chemicals used in farming, solvent fumes, landfills, military stuff (such as rocketry, nuclear weapons and germ warfare), dust, methane, radon gas emissions, wildfires, volcaninc activity.
2007-05-30 15:50:46 · answer #3 · answered by Q_142857 3 · 0⤊ 0⤋
carbon monoxide
sulphur oxide
nitric oxides
hydrocarbons
industrial wastes
2007-05-31 03:49:37 · answer #4 · answered by Anonymous · 1⤊ 0⤋