To order the activities from the greatest to least impact in reducing the consumption of fossil fuels, we can consider the emissions associated with each choice:
- Walk to work - This has the least impact on fossil fuel consumption since it uses no fuel.
- Carpool to work - This reduces the number of cars on the road, decreasing overall fuel consumption.
- Drive an electric car to work - While electric cars can still have some environmental impact depending on how the electricity is generated, they generally produce less direct fossil fuel consumption compared to gasoline-powered cars.
- Drive alone to work - This has the highest impact on fossil fuel consumption, as it involves the use of a personal vehicle without any ride-sharing.
Putting this in order gives us:
- Walk to work
- Carpool to work
- Drive an electric car to work
- Drive alone to work
So, the order from greatest to least impact would be: Walk to work, carpool to work, drive an electric car to work, drive alone to work.