Which of the following drawbacks of conventional sources of energy is forcing countries to shift to non-conventional sources of energy

1. greenhouse gases emission
2. fossil-fuel dependence
3. non-renewable resources
4. All of them.

Assertion (A): Nuclear energy is the most reliable source of energy.

Reason (R): Nuclear fuels are less affected by fluctuating fuel prices than the more volatile industries like oil and natural gas.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R does not explain A.
3. A is true but R is false.
4. A is false but R is true.

State two differences between conventional and non-conventional sources of energy.

Give a reason for each of the following:

Non-conventional sources of energy are called the resources of the future.