Picture from: http://www.polandspring.com/DoingOurPart/EcoShapeBottle.aspx
An "eco-shape" bottle .. uses less plastic (up to 30% lesser) and also produced fewer CO2 emissions in manufacturing the bottle. Refer
here It is suggested that there are opportunities to innovate and find profit in reducing CO2 emissions.
While this is no Green IS/Green IT .. but something align well with the spirit of working towards a more sustainable future of mankind.