This hydro-fracing site has a holding pond from which compounds are allowed to evaporate into the air, and what looks like an old chemical spill.

On December 22nd 2008, a holding pond at a Tennessee Valley Authority coal-fired power plant ruptured, sending 978m gallons (3,702m litres) of ash into a nearby river, where it turned to sludge.

And so they walked away from the pond, the little boy holding the bark ship carefully in his arms.