This is one man’s answer to the threat of Global warming. The 21st century Noah’s Ark if you like, called a Lilypad. Award-winning architect Vincent Callebaut has designed a self-sustainable “Lilypad City” as a long-term solution to the problem of rising sea levels caused by climate change. A Lilypad City would provide a home for 50,000 people and would float atop water. The artificial island includes a lake, mountains, shopping malls and drifts on the ocean currents.