The coolest tech startups at SXSW Eco

PAX Pure

PAX Pure uses thermal water purification, a new type of desalination process. The water can be distilled at low temperatures, so it can use low-cost or free heat from the sun or waste heat from industrial processes. The company won the SXSW Eco startup showcase greentech category.

Image: PAX Pure

By Lyndsey Gilpin

Lyndsey Gilpin is a former Staff Writer for TechRepublic, covering sustainability and entrepreneurship. She's co-author of the book Follow the Geeks.