the certificates are sold from here through a partner company and this man: tom morton. morton sells the certificates mainly to businesses in europe and the us -- companies that want to offset their own carbon emissions. he passes on most of the money to vestergaard-frandsen: about 10 million euros in the past year. tom morton considers the water filter project highly sustainable -- because it's stringently controlled. >> carbon finance is about being paid for outcomes. and if you get it wrong then you are not paid. and so there is a much greater incentive to have a very robust system in place. >> back to western kenya -- o a sporting field. vestergaard frandsen's employees are spreading good cheer. they've organized a football tournament. football is very popular, especially with young people. the occasion is used to acquaint them with the water filter. vestergaard frandsen wants to expand the project in africa. janet, his instructor, is prepared to go abroad if she's needed. >> as long as i am going to do the same thing, as long as i am going to change peoples lives, t