General Knowledge :: Environmental Science
- Water from springs contain dissolved __________ compounds which are used to cure some skin diseases.
- Which of the following is considered a variable gas in the earth's atmosphere?
- Eutrophication of water bodies resulting to killing of fishes is mainly due to non-availability of
- The ozone at ground level is primarily from __________ precursors.
- The earth's first atmosphere was composed primarily of:
- Which gas is likely to be reduced in the atmosphere by deforestation?
- In a volume of air near the earth's surface, ____ occupies 78 percent and ____ nearly 21 percent.
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