Having resources secured is fundamental for our ability to operate our economy. Mathis Wackernagel More Quotes by Mathis Wackernagel More Quotes From Mathis Wackernagel Humanity is living off its ecological credit card and can only do this by liquidating the planet's natural resources. Mathis Wackernagel credit humanity cards We have to prepare our cities for the increasing scarcity of resources by increasing their density and energy efficiency. Mathis Wackernagel density energy cities Pain is not an evolutionary error. Mathis Wackernagel errors pain The two-word definition of sustainability is 'one planet.' Mathis Wackernagel sustainability definitions two In the long run, [population] is probably the most significant factor, if we’re looking at short-term gains, getting out of fossil fuel is the fastest way of reducing the surplus. Mathis Wackernagel us We can spend twice as much as we earn for some time, [but] even if your fortune is big, it’s going to go down. Mathis Wackernagel us