Which of the following is not a technology that can be used to conserve resources?
a. hydropower
b. volcanic power
c. natural gas
d. geothermal

The correct answer is option c. natural gas .

Explanation:

Natural Gas cannot be used to conserve resources. Otherwise, it has a negative impact on the environment.

While the use of natural gas does not become as polluting as the use of oil or some other fossil fuel, there is a danger when it is extracted from the wells.

During this process, methane gas leaks, which is much more toxic and polluting than carbon dioxide.

Methane gas has a negative effect on the environment and is very effective in trapping heat in the atmosphere. Its duration is about 100 years.

On the other hand, hydropower serves to generate energy without using any type of fossil fuel that damages the environment, but uses water.

As for the Volcanic Power, it has been proven that deposits from volcanic eruptions leave the ground very fertile, and it has been studied the possibility that in the future some source of electricity from the volcano's energy can be formed.

And finally, geothermal is a type of renewable energy used by power plants where they use heat from inside the earth and thereby produce electricity.