NEET BIOLOGY

Detailed explanation-1: -Fossil fuels are not considered as sustainable energy sources because they are limited, cause immense pollution by releasing harmful gases and are not available everywhere on earth. Fossil fuels normally include coal, oil and natural gas.

Detailed explanation-2: -This means that nonrenewable resources are limited in supply and cannot be used sustainably. There are four major types of nonrenewable resources: oil, natural gas, coal, and nuclear energy.

Detailed explanation-3: -Oil is an unsustainable resource because it is nonrenewable. Renewable resources are nondepletable and have fewer environmental impacts. The Earth naturally replenishes renewable resources, which reduces adverse exploitation effects. Environmentalists rely on the sun, wind and water to produce endless energy supplies.

Detailed explanation-4: -Fossil energy sources, including oil, coal and natural gas, are non-renewable resources that formed when prehistoric plants and animals died and were gradually buried by layers of rock.

Detailed explanation-5: -Examples of renewable energy sources include wind power, solar power, bioenergy (organic matter burned as a fuel) and hydroelectric, including tidal energy.