Walk or Bike
The most sustainable way to get around is to walk. It requires no products, so no energy used. Next is to bike. You just need to buy a bike, which takes resources but obviously not any energy to use it. Advocate for dedicated bike lanes. Advocate for walkable and bikeable communities. Get a home in a walkable/bikeable community. Live close to your work so you can walk or bike. Also, walking and biking is healthy!