Running on sand requires 1.6 times more energy spent than running on hard surface, so the force applied by our foot on sand is less.
Answer:
temperature, atmosphere pressure,wind, topography, humidity etc
Answer:
Using clean, renewable, and readily available solar energy as fuel.
Preserving natural resources by not requiring the use of wood or other biomass fuels to cook.
Not producing dangerous emissions which pollute local environments and contribute to climate change.
Explanation:
