This courtesy of entomologist and great biodiversity E. O. Wilson:Take all humans on earth — all 6.5 billion of us — and log-stack us, we humans would fill a cube just 1 mile on a side. One cubic mile of humans on the whole earth. So few humans in many senses, yet each of us, on average, now requires roughly 24 acres of Earth's surface to support our consumption (much more than 24 acres for those of us in the US and much much less for those in the poorest nations).
That entire cube could fit into the Grand Canyon.
This little mass of humanity is annhilating life at a rate greater than any natural disaster in the history of the planet.
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