For us, it means we own a large parcel of valuable land and have decided to not use 80 % of it for commercial gain. (redpalmvillascostarica.com)
Some scientists are also concerned that new forests could take up valuable land needed for farming. (science.howstuffworks.com)
Recently, new plant species have been tested that grow well on marginal lands and could therefore produce biofuels without directly competing with valuable lands. (greenfacts.org)