While buying things online from Amazon, Zappos, Buy.com, etc - is the carbon footprint of the shipments a consideration:<p>http://www.fgx.com/tools/carbon-calculator/<p>I had submitted a collective neighborhood purchasing idea to Amazon four months ago, but never heard back from them. The idea was to encourage green shipments and maybe even give some form of carbon credits to people who take the extra effort to group their purchases with others in the neighborhood. This might also encourage a kind of social networking on Amazon which is currently not available.<p>This is the link to it: http://www.scribd.com/doc/19420681/Amazon-Neighborhoods?secret_password=24cz10i0xg7pxtzrbhur<p>Would such an idea be useful and/or feasible? If it is, then what should be the next steps?