This amazing Bangladeshi air cooler is made from plastic bottles and uses no electricity

Summer is upon us, and complaints about the heat will soon be common in many places. But few places will reach the scorching temperatures residents of Bangladesh will experience, and air conditioning is simply not an option for most people living in rural areas. Ashis Paul developed a clever DIY cooling system that doesn’t need any electricity and is built from a common waste item: empty plastic soda bottles. In just three months, Paul’s company has helped install its smart powerless air conditioners, called Eco Coolers, in 25,000 households, with many more still ahead.

http://inhabitat.com