This is a really interesting one - companies are now starting to look at ways they can offset their carbon as well - by funding or wanting to create areas for carbon sequestration - how do we allow people to help fund, or input into projects that are going on already?

Nice idea. Could there be a way to pay offsets into a central pot for funding some of the other ideas mentioned on this forum, e.g. longer-term funding for existing schemes, building biodiversity enhancements into publicly-funded developments?