What is the cheapest way to cut carbon?

In the trendier parts of Berlin, cargo bikes are the rage. Locals use the bicycles, which have a wheelbarrow-sized box attached at the front, to do the weekly shop or ferry children around.
Because they cut carbon-dioxide emissions, local authorities are subsidising the craze. But the well-intentioned schemes look pricey when you consider how much carbon is abated. One scheme costs the city 370,000 (NZ$613,000) but is expected to reduce emissions by only seven tonnes a year. That works out at over…

Click here to view the original article.