- Bees pollinate 71 of the 100 crop species that provide 90 percent of food worldwide.
- Pettis, a former scientist at the U.S. Department of Agriculture, published a study in 2016 on the quality of pollen produced by goldenrod — a hardy perennial also known as solidago that produces a myriad of small, yellow, daisy-like flowers.
Europe’s bees stung by climate, pesticides and parasites
