Answer:
Methane is found deep in the Earth's crust, which makes it difficult to harvest
Explanation:
According to the Scientific American: <em>"With drillers tapping into massive stores of natural gas across the United States, scientists are researching ways to capture it more effectively"</em>. On the same article, you can find that: <em>"Energy companies are looking for a cheap way to separate these gases to yield a pure methane stream"</em>. So it is hard and expensive to harvest methane, even though drillers keep finding it.
Answer:
1. mercury 2. venus 4. mars
Answer:
D
Explanation:
These are all individual liberties because they all apply to the first amendment (Freedom of speech, religion, press, petition and expression) rights as well as they are things you can do on your own and usually do.
In the given statements, all the statements are correct except option A.
Option: B, C, D and E
Explanation:
The concentration of air molecules and pressure of it on the earth surface is called as air pressure. The average air pressure at sea level is 1013.25mb.Altitude, temperature has a very significant relationship with air pressure. When temperature increases air pressure decreases and when temperature decreases air pressure increases.
Like with increasing altitude air pressure decreases. As in maximum height the concentration of air molecules become light and it reduces the pressure in the atmosphere. Oxygen concentration and water vapour also decreases with increasing altitude.
