ROTTERDAM, the Netherlands, April 23 (Xinhua) -- In Rotterdam, the largest seaport in Europe, climate adaptation is becoming a driver of innovative entrepreneurship and urban development, transforming the second largest city of the Netherlands into an avant-garde green and circular metropolis. EXEMPLARY ECOSYSTEM The so-called BlueCity, an exemplary ecosystem of circular economy entrepreneurs, lies at the heart of this effort as Rotterdam aspires to make a significant contribution to the country's overall goal to have a sustainable, fully circular economy by 2050. "This building used to be a swimming pool, now it has been repurposed and is the home of...