The World Economic Forum (WEF) wrapped up on Friday, closing out a week of panels, parties and sub-zero temperatures with more serious talk dominated by climate change and gloom over slowing growth.Here are some of the top quotes on key issues over the past week.Climate emergency"I am here to say our house is on fire." – Greta Thunberg, a 16-year-old Swedish teenager whose advocacy against global warming has inspired global youth.