Are iPads and Kindles better for the environment than books?
Let’s talk numbers. According to the environmental consulting firm Cleantech, which aggregated a series of studies, a single book generates about 7.5 kg of carbon dioxide equivalents—the value of all its greenhouse gas emissions expressed in terms of the impact of carbon dioxide. That includes production, transport, and either recycling or disposal. (Attention students: Your textbooks are particularly bad, releasing more than double the CO2 equivalents of the average book.)
Apple’s iPad generates 130 kg of carbon dioxide equivalents during its lifetime, according to company estimates. Amazon has not released numbers for the Kindle, but independent analysts put it at 168 kg. Those analyses do not indicate how much additional carbon is generated per book read (as a result of the energy required to host the e-bookstore’s servers and power the screen while you read), but they do include the full cost of manufacture, which likely accounts for the lion’s share of emissions. (The iPad uses just three watts of electricity while you’re reading, far less than most light bulbs.) If we can trust those numbers, then, the iPad pays for its CO2 emissions about one third-of the way through your 18th book. You’d need to get halfway into your 23rd book on Kindle to get out of the environmental red.
So far, electronic readers—not the machines, in this case, but their owners—are far surpassing that pace. Forrester Research estimates that the average user purchases three books per month. At that rate, you could earn back your iPad’s carbon dioxide in just six months.
» via Slate





