What does Dr Metcalf mean when he says that sunshine can be alternative to fire?

Answer 1

Dr. Metcalf suggests that sunshine can serve as a cleaner and more sustainable energy source compared to fire, which typically relies on fossil fuels and can produce harmful emissions. By harnessing solar energy, we can reduce our reliance on combustion-based energy, thus minimizing environmental impact. This perspective highlights the potential of renewable energy sources to meet our energy needs while promoting a healthier planet.