As hard as the bike industry can try, making production as carbon neutral is a hard task. Bamboo, on the other hand, is a carbon sink, absorbing carbon during its lifetime. The net result for bamboo bikes is a carbon negative bike frame that, at least, helps to offset the carbon debt incurred from assembly, parts and shipping. Andy and Laura started Netham Bamboo Bikes in Bristol where they assembly each bike. They were featured in Cyclist magazine last year.