Sustainability isn't a choice; it's our responsibility to the planet and future generations.
实现明天的唯一限制是我们今天的疑虑。
The division of labor is limited by the extent of the market.
The world is full of people who have stopped listening to themselves or have listened only to their neighbors to learn what they ought to do, how they ought to behave, and what the values are that they should be living by.
History is the shadow cast by the present.