I don't believe in "offsetting personal footprint". This idea appeals to personal guilt, while aims at filling the pockets of the founders. The solution should be going after companies who make products that break by design after certain time of use, thus forcing the customers to buy new items. If done right, this will be painful for both companies (many will have to close the shop) and for the people who are used to cheap shiny stuff, but the result will be a cleaner planet and healthier business model.