|Dallol Volcano, Ethopia|
Photograph by Philippe Bourseiller
Walking or hiking is a very environmentally friendly way of seeing the countryside. However, when on a walk, always keep to the footpaths. Stay out of sensitive areas such as meadows and wetlands unless there are designated paths. And if you are visiting very sensitive areas, minimize the risk of spreading invasive species or disease by making sure you're not transporting insects, pollen or seeds.
- from the book '365 Ways to Save the Earth' by Philippe Bourseiller