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A solar distillation system uses vacuum tube solar collectors to mimic nature's process and produces clean water from nearly any source at low cost. The system by WaterStillar Water Works functions even on cloudy days, although at a slower rate, and can be scaled up to produce as much as 2,642 gallons of drinking water per day. 

One is an eyesore and a health hazard, the other one is plain dirty. So what do you get when you combine processed scrap tires with diesel fuel? In what might be a case of two wrongs making a right, Australian startup Green Distillation Technologies (GDT) has shown that it is possible to get a cleaner blend of fuel by combining oil derived from old tires with diesel.

From historic climate change marches and bold advocacy by companies on the price of carbon to global economic volatility and heated debates on inequality, 2014 was a year of accelerated awareness and action for sustainable development. Our Ten Trends for 2015 distills SustainAbility's thinking over the past year and forecasts the issues that will shape the sustainable development agenda in 2015.  

A vacuum distillation system by H2O GmbH has reduced the amount of wastewater produced and saved more than €100,000 ($108,280) annually for thermofin, a German metalworking company.