Travel
There are few things in life that are completely free of charge, and have the résumé that walking has. It improves your physical and mental health, makes you more alert, more productive, improves your sleep, boosts your mood, gives you an opportunity to learn, chat, dream, experience nature, and reduce stress. Walking is seriously underrated.
And here’s the cherry on top: it creates ZERO pollution and is totally carbon-free.
Unlike cars, trains, buses and taxis, walking produces no carbon emissions at all. It doesn’t give off any stinky, toxic city-filling smog and it doesn’t use up any precious resources (except your breakfast).