It was the puddles of green sludge left by the tires of massive tractors in western Belgium’s industrial farmlands that drew the attention of biological engineer Ineke Maes.
The slime was destructive algae, the result of the excess of chemicals used by farmers to boost their crops, but at a high cost to nature. Maes had hoped the European Union’s environmental policies would start to make a fundamental difference by improving exhausted soils.
