（ 笑聲 ） 我嘅主題係噉樣嘅 ： 我哋嘅地球已經有四十五億年歷史 但過去一百年嚟係特別嘅 呢個係有史以嚟第一次 有一個物種 ， 即係我哋人類 將呢個星球嘅未來掌握喺自己手裏面
My theme is this: our planet is 4.5 billion years old, but the last 100 years have been special, and this is the first time in history that there is a species that we humans have taken the future of this planet into our own hands