SpaceShare Green Travel -- carpool, community building
SpaceShare Green Travel builds ride- and room-share tools for festivals and conferences. Our sister effort Verdant Event builds complete websites for conferences with greening tools integrated.
The fastest, easiest (and least interesting) way to involve attendees is to ask them to contribute cash, most commonly to carbon offsets. more »Carbon offsets are at their best when they are educational, teaching people about their environmental impact by measuring it. So we particularly dislike the approach of a voluntary contribution towards the average carbon emissions of an event attendee... it removes the learn-through-measurement approach that is carbon offsetting's biggest benefit.
Nothing is as powerful as getting attendees to participate. Greening and other "socially responsible" activities shouldn't be seen primarily as a "cost" to an event, but as means to your ends.