Only about 3 percent of the worlds water is fresh, and even less than that is usable, because most of it is locked up in glaciers or in permanent snow fields.
The correct answer is D.
Answer:
D geothermal
Geothermal energy is harnessed beneath the Earth's surface.
Popliteus muscle
from: https://en.m.wikipedia.org/wiki/Popliteus_muscle
The advantages that are provided to developing rural areas by building and using an anaerobic digester is that anaerobic digesters offer both a source of energy and a sanitary method of waste disposal which can help control disease.
<h3>What is an anaerobic digester? </h3><h3> </h3>
An anaerobic digester is a tank. It's a tank in which the size and appearance change considerably depending on what use is the digester being applied for.
- A variety of anaerobic digesters is the household digester which is used for a single family. It has a volume of less than one cubic metre.
- In an industrial-scale anaerobic digester. The size can easily surpass 5,000 cubic meters.
- A digester used on a farm or a ranch has a typical capacity of a few dozen cubic meters.
Therefore, the advantage is that anaerobic digesters offer both a source of energy and a sanitary method of waste disposal which can help control disease.
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