" The mutualistic relationships between bees, the flowers that they pollinate, and the bacteria that live within the roots of those plants are at the heart of the functioning of a natural, species-rich meadow. The problem is that these relationships can be ruined by application of a sack of fertiliser, which allows the grasses to swamp the legumes and other wild flowers, swiftly resulting in a bright green, flowerless sward, with no legumes, no Rhizombium, and no bees. In the farming world this is known as "improved" grassland. In the 1940's Britain had in the region 15 million acres of flower rich grasslands. It is hard to get precise figures, but about 250,000 acres remain; a staggering loss of over 98 percent. Fertilisers were cheap, and successive governments were keen to persuade farmers to boost productivity, so ecosystems that had taken hundreds of years to develop were subject to swift and wholesale destruction. "

― Dave Goulson , A Sting in the Tale: My Adventures with Bumblebees