Question

question #9
why is it necessary to conserve nonrenewable energy sources?
a they can be exhausted.
b they can be easily extracted.
c they are the only sources of energy on earth.
d they are energy sources with the least amount of emissions.
question #10
as part of an investigation, a group of concerned citizens collected data about the global consumption of energy by fuel type in the last 20 years. the table shows the groups data.
graph: world energy consumption by fuel, with year (1990, 1995, 2000, 2005, 2010) on x - axis and quadrillion btu on y - axis. lines for petroleum, coal, natural gas, renewables
the citizens concluded that fossil fuel consumption has reduced across the world. based on the graph, is the conclusion supported and why?
a yes. consumption of renewables has increased globally over the time period.
b no. consumption of renewables has increased globally over the time period.
c yes. consumption of coal, petroleum, and natural gas has increased globally over the time period.
d no. consumption of coal, petroleum, and natural gas has increased globally over the time period.

Explanation:

Question #9

Nonrenewable energy sources (like fossil fuels) are finite, meaning they can be exhausted (used up) over time. Option B is incorrect as extraction ease isn't a reason for conservation. Option C is wrong because there are renewable sources too. Option D is incorrect as nonrenewables often have high emissions (e.g., coal, petroleum). So the correct reason for conservation is that they can be exhausted.

Fossil fuels include coal, petroleum, and natural gas. The graph shows that the consumption of coal, petroleum, and natural gas (fossil fuels) has increased over the 20 - year period (from 1990 - 2010). So the conclusion that fossil fuel consumption has reduced is wrong. Option A and C say "Yes" which is incorrect. Option B's reasoning about renewables is not relevant to fossil fuel consumption. Option D correctly says "No" because fossil fuel (coal, petroleum, natural gas) consumption has increased.

Answer:

A. They can be exhausted.

Question #10