Aside from the invasive species catching a free ride every now and again, the transport industry causes a huge volume of carbon dioxide emmissions annualy. A Maryland-based non-profit, Carbonfund.org, came up with a neat way of offsetting these emissions by launching a Carbonfree Shipping program, which allows retailers to reduce some of the carbon footprint created by shipping packages to customers. Four companies — BetterWorld.com, Evogear.com, 3R Living and alonova.com — have joined the program.