Hat is the main idea of this paragraph?
scientists do not fully understand ccd (colony collapse disorder). they know that ccd puts the world's honeybee population at risk, which, as a result, puts the health of agricultural crops at risk. scientists first observed ccd in north america in late 2006. they have been working hard to discover its root cause, whether a pathogen, a parasite, an environmental toxin, or, as crazy as it may sound, cell phone transmissions.