Wild bees contribute billions of dollars a year to human agriculture.

Assignment of monetary value to natural ecosystems and their effects is misleading because it imposes an assumed linearity of value: the false 10% of the wild bees are worth 10% of the value of all of them.

We could cope with loss of 10% of the world's total wild bee population, but loss of 100% of it would be a permanent catastrophe, far more than 10 times as bad.