Tag: air and water pollution control

Global warming is among the most serious outcome of industrial pollution, witnessed on the account of the steady rise of industrial activities. Industries release into the atmosphere a variety of greenhouse gases including carbon dioxide $(CO _2)$ and methane $(CH _4)$. These gases absorb thermal radiation from the sun thereby increasing the general temperature of the earth, leading to global warming.

Nitrous oxide $\displaystyle N _2O$ is a greenhouse gas scientists link to global climate change. Following are the sources of nitrous oxide.
(1) Fertilizer use
(2) Fossil fuel combustion
(3) Biomass burning
(4) Changing land use

Pollutions occur due to hydrocarbons are air, water soil pollutions. Hence option D is correct.

The following are the source for hydrocarbons as pollutants:
Anaerobic bacterial decomposition of organic matter, forest fires and trees and combustion of fuels. Solvents in industrial operation.
Hence option D is correct.

The greenhouse gases absorb more of infrared rays and emits heat and this heat cannit be escaped from the atmosphere-resulting in heating up of the earth surface thereby resulting in global warming and hence greenhouse effect.

The gases in the atmosphere that absorb radiation are known as "greenhouse gases" (sometimes abbreviated as GHG) because they are largely responsible for the greenhouse effect. The most significant greenhouse gases are water vapor $(H _2O)$, carbon dioxide $(CO _2)$, methane $(CH _4)$  and nitrous oxide $(N _2O)$ and ozone $(O _3)$. While oxygen $(O _2)$ is the second most abundant gas in our atmosphere, $O _2$ does not absorb thermal infrared radiation to cause green house effect.

Highest contribution to green house gases are $CO _2 $  $60$% and $CH _4$  $20$% which absorbs more of the infrared rays and UV rays and causes global warming.  

Nitrogen is not a green house gas

$CO _2$ absorbs most of the infrared rays and heats up the earth surface thereby causing global warming.

Carbon monoxide is a colorless, odorless, and tasteless gas that is slightly less dense than air. Carbon Monoxide and other reactive gases Carbon monoxide (CO) is not considered a direct greenhouse gas, because it does not absorb terrestrial thermal IR energy strongly enough.