Green Volunteering :
For those who want to do a bit more, why not consider short-term volunteering? You could volunteer to be guide/naturalist/volunteer after reaching certified programmes. Join a local organization in cleaning of plastic, tree planting programme.
Go Biking :
Reduce your carbon footprint and participate in Earth-friendly transportation options like biking, walking and taking public transit. These alternatives are often cheaper than taking a cab or renting a car.