The right answer is lava domes and plinian
5.75%
15.5%
25.25%
Answer:
Option (1)
Explanation:
Out of all the water body (total composition) present on earth, about 97% is the ocean saline water and the remaining 3% comprises the freshwater that includes the water of the rivers, lakes, streams and ponds.
Again, from this total amount of freshwater (3%), the glaciers and ice caps cover nearly 68% of it, groundwater covers about 30% and some other surface (fresh) water comprises the remaining 2%.
So, in simple words, it can be concluded that about 2% (68/100*3) of the freshwater is occupied by the glaciers.
Thus, from the given options, the most approximate value is 2.15% which is option (1).
Answer: B. Natural Gas
Explanation:
Natural gas is the cleanest-burning fossil fuel as it primarily emits just carbon dioxide and water vapor when burnt. It is cleaner than petroleum, oil, and coal.
The cleanest-burning fossil fuel is B. natural gas. This is because natural gas is a hydrocarbon gas mixture primarily composed of methane. When natural gas is burned, it produces mostly carbon dioxide and water vapor. These are the same compounds that we exhale when breathing. Compared to other fossil fuels like petroleum, oil, and coal, natural gas releases a lesser amount of harmful emissions and pollutants, thus making it the cleanest-burning fossil fuel.
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