Everything we think about regarding sustainability - from energy to agriculture to manufacturing to population - has a water footprint. Almost all of the water on Earth is salt water, and the remaining freshwater supplies are split between agricultural use and human use - as well as maintaining the existing natural environment.

In a Photoshopped world, only the skeptical eye prevails.

But here's the ugly truth: nature doesn't care about democracy, or who's right, or what's fair. And because of the slow-change aspect of climate, we can't wait until the worst effects are upon us to make a decision -- by then, it would be far, far too late. The scenario we may be faced with is one where doing something for the wrong reasons, run by the wrong people, may still save more lives than holding out for a more appealing option.

Future forecasting is all about testing strategies - it's like a wind tunnel.

Even if we were to stop putting out greenhouse gases right now, we'd still face decades of warming.

Human civilization has been changing the Earths environment for millennia, often to our detriment. Dams, deforestation and urbanization can alter water cycles and wind patterns, occasionally triggering droughts or even creating deserts.

Many of the cognitive enhancement drugs serve to increase focus and concentration. But 'letting your mind wander' is very often an important part of the creative process.