When floods devastated Bangkok more than a decade ago, Thai landscape architect Kotchakorn Voraakhom became determined to help her sinking hometown fight this deadly climate threat. The floods changed my life," said Voraakhom. "I started using the tools of landscape architecture (to tackle) climate change." The 2011 floods killed hundreds and displaced millions. "For us, climate change is primarily a water crisis," she said. "Our people can feel its impacts in their daily lives, each year through worsening floods, rising sea levels, and severe drought." In many sinking cities, including Bangkok, the current urban infrastructure is not fit for purpose and is "reducing our ability to adapt," said Voraakhom, noting that many of Bangkok's waterways and canals have been destroyed or have fallen into disrepair. "For us, as a city of water, the only way is to go back to our amphibious culture and reclaim the relationship with water." The architect said she integrates nature and water into her designs to create landscapes that help alleviate flooding and add greenery to densely populated cities. Voraakhom also created Asia's largest rooftop farm, Siam Green Sky, transforming 22,400 square meters (241,000 square feet) into a lush haven. The farm, which recycles food waste from restaurants in the building below and uses it as plant fertilizer, also slows down, soaks up and stores large amounts of rainwater. It is then used to grow vegetables, herbs and fruit, as well as rice.