Question 1

What is the best renewable energy source?

Accepted Answer

There is no single 'best' source — it depends on geography and conditions. Solar is cheapest in sunny regions, wind excels in coastal and plains areas, and hydroelectric provides reliable baseload power. The most effective approach combines multiple sources in a diversified energy mix.

Question 2

Is nuclear energy considered clean energy?

Accepted Answer

Nuclear power produces virtually zero carbon emissions during electricity generation, making it one of the lowest-carbon energy sources available. However, debates continue around radioactive waste disposal, accident risks, and whether it should be classified alongside renewables like solar and wind.

Question 3

How much of the world's energy comes from renewable sources?

Accepted Answer

As of the mid-2020s, renewables account for roughly 30% of global electricity generation, with hydropower being the largest contributor followed by wind and solar. However, when considering total primary energy (including heating and transport), the renewable share is lower at around 15-20%.

Renewable Energy & Sustainability Quiz

About the Renewable Energy & Sustainability Quiz