Marco Cremona’s smaller-than-average physique probably contributed to his pushing his limits even at a very young age, excelling academically and in sports. Today, he is a water treatment engineer, a hydrologist, an activist, a researcher, and a sportsman. He has designed and built an international award-winning water-and-electricity self-sufficient home in Mosta. He has also designed the world’s first sewage-to-drinking water plant for hotels – and was filmed by BBC drinking that water.  Oh, and he climbed the Everest.