We need to conserve the use of energys
converted from
of energy because most of the energy we use is
When fossil fuels are burned,
-> Which is a non-renewable source of energy.
converted to
energy stored in the fuels is
- energy.
Module 4: Gadgets Work Wonders (11)

We need to conserve the use of energies converted from of energy because these are non-renewable source of energy.

Explanation:

Fossil fuels are forms of non-renewable energy which once burns means ends, cannot be filled further. That's why we should choice the use of renewable energy sources i.e. solar energy, wind energy etc. Renewable energy sources are most common in developed countries where technological advancement is much more progressive than us.

Fossil fuels are another source of environmental pollution. It pollutes air in large extent. Burning of fossil fuels produce carbon-di-oxide, CO, SO2 etc. Renewable energy sources are environment friendly resources. It can be regenerated any time.