Question

Energy sustainability can best be achieved by using ______.

Answer 1

If this question has the same set of options like the previous ones, here are the following choices:
a. nonrenewable energy sources        b. renewable energy sources
c. carbon sequestration                       d. recycled plastics

The answer would be: 
Energy sustainability can best be achieved by using renewable energy sources.
>To create a sustainable future, we need to concentrate on renewable energy resources, such as wind power.

Answer 2

Following are the choices:

a. nonrenewable energy sources b. renewable energy sources

c. carbon sequestration d. recycled plastics

The correct answer is:

b. renewable energy sources

Explanation:

Renewable energy is energy that is obtained from renewable resources, which are naturally provided on a human timescale, such as sunlight, wind, rain, tides, waves, and geothermal heat. Renewable energy compares to the provision of energy via renewable sources which are simply replaced fast enough as being used.