translation.en: If we lead lives where we consciously leave the lightest possible ecological footprints, if we buy the things that are ethical for us to buy and don't buy the things that are not, we can change the world overnight.
translation.zh: 如果我们在日常生活中， 尽量留下最轻的生态足迹， 如果我们只购买该买的东西 不买不该买的东西， 我们可以一夜之间改变世界。