Virtual water is the amount of water that is embedded in food or other products needed for its production. For example, to produce one kilogram of wheat we need about 1,000 litres of water, i.e. the virtual water of this kilogram of wheat is 1,000 litres. For meat, we need about five to ten times more.[World Water Council]

Credit: Ianiv and Arieanna

People who are unaware of the negative environmental impact of excess water consumption argue that, after all, it’s *just* a cup of coffee and that we have enough water in the world. My question to them is - How much of the world’s water is available for human consumption? Yeah, I told you about that a few months ago, remember? 0.38% – not nearly enough to sustain our current consumptive patterns.

Credit: Snap(R)

I’ll be the first to admit (disclosure time) that I do enjoy a cup of coffee, particularly when it comes to meetings with colleagues, friends, clients or the like. But I always feel guilty about it, and I try to find ways to diminish my water consumption, all the time. Moreover, a vast majority of my research work is on wastewater recycling and water conservation. Furthermore, I work hard at educating the public about the current state of the world in regards to water scarcity and the need to recycle and reuse wastewater.

The concept of virtual water isn’t new, but it is a powerful tool that helps us understand how negative our consumption patterns are. I just hope that the great work that water-focused researchers (myself included) are doing to highlight the negative consequences of our day-to-day activities and over-consumptive patterns can resonate with the public. Please remember that water is VERY, very scarce, before flushing your toilet, before purchasing bottled water, before taking long showers. Thank you.