Mount small blades on the side of the wheels to make them spin by themselves before landing to reduce tyre wear upon contact with tarmac.

Recycling the deiceing fluid.

Solar panels to generate energy

When going from A to D some times you need to transit in B and even C. Price match the most eco-friendly with the cheapest alternative in points.

Not handing out napkins under every drink.

Use larger packages for the most consumed drinks, instead of handing out endless amounts of cans (less garbage, less weight on board) .