Another, longer interview with Peter Mertens: https://www.youtube.com/watch?v=W__A569KX2c https://www.youtube.com/watch?v=W__A569KX2c The shorter video in the

Another, longer interview with Peter Mertens: https://www.youtube.com/watch?v=W__A569KX2c https://www.youtube.com/watch?v=W__A569KX2c The shorter video in the Cleantechnica article seems to be based on a transcript of the above.