I was chatting with some friends this weekend when the discussion transformed about sustainability and green design. One friend posed an interesting question, " each time in a public toilet after washing my hands, I always think if its better to use the electric hand dryer or the paper towels. Do I cause more harm to the environment through increased electricity use or by consuming paper." This almost ended the discussion because none of us had an answer. I guess the answer lies in a life cycle analysis of the two acts. For example, the footprint of paper would be much larger in Singapore than many other countries where most products are imported. A quick search on the internet reveals the answer at Slate Magazine. The conclusion, the net difference in long term carbon emissions is miniscule between the hand dryer and the paper towels. This study is based in USA and hence there could be regional differences. I guess, it would be impossible for us to ever determine the most sustainable way forward. Somehow, traditional lifestyle practices, such as using handkerchiefs are unbeatable. There is no harm in going back if its for good.
