Fossil fuel alternative Crossword Clue

 The answer to the crossword clue "Fossil fuel alternative" is SOLAR. It is a renewable energy source that harnesses the power of the sun to generate electricity. Solar panels convert sunlight into electricity, which can be used to power homes, businesses, and other devices. Solar energy is a clean and sustainable alternative to fossil fuels, and it is becoming increasingly popular as the cost of solar panels decreases.

Here are some other possible answers to the clue "Fossil fuel alternative":

WIND

HYDRO

GEOTHERMAL

BIOMASS

NUCLEAR

The specific answer that is correct will depend on the specific crossword puzzle.

I hope this helps! Let me know if you have any other questions.