Weeds increase bees and crop yields, yes they can!

Industrial agriculture is killing bees and other pollinators, thus paradoxically threatening future crop production because 35% of world crops need pollination. In the USA honeybees have declined by 59 % in 61 years, and weed diversity by 50 % in 70 years. Bretagnolle and Gaba report the unexpected benefits of weeds for bees and crop production.