Certain species of bees have been placed on the endangered list for the first time just at the end of last month. Many people know that the numbers of bees are dwindling but don't know how we can solve the problem besides stopping the use of pesticides and herbicides as mentioned in the article below by the free thought project. But it seems getting this accomplished may be impossible, and it's also not the only thing harming bees.
http://thefreethoughtproject.com/7-bee-species-declared-endangered/
I have been studying mycology(the study of fungi) for about 5 or 6 years now and while I cultivate and do research on my own(nothing significant) I like to read books and watch videos from some of the most prominent mycologists in the world who are far more brilliant than I.
After watching videos and reading up on the matter I believe the best solution at the moment for saving bees and stopping colony collapse disorder is by using fungi. Certain polypores(type of fungus) mycelium can boost bees immune systems if they eat it, and scientific studies have shown so far that the bees who eat these polypores live longer. At the moment there is nothing else that helps prolong bees life more than by feeding them polypore mycelium.
Probably my favorite mycologist Paul Stamets has patented his own method of feeding bees these polypores he calls mycohoney. You can find all of the information on these studies and his patent here. https://www.google.com/patents/US20140220150 Hopefully this mycohoney will be available to the public soon. But instead of waiting on the bureaucracy to approve something we need now, learn the art of mycology and beekeeping now and we can find our own methods of feeding bees these polypores.
for those who don't know, colony collapse disorder is a huge phenomenon going on right now where entire bee colonies die and it's what's causing them to go endangered. Colony collapse disorder is caused by many things but mostly pesticides and toxins in general as well as viruses.
if you like scientific journals here's a plethora of info on CCD and what causes it. http://journals.plos.org/plosone/article?id=10.1371%2Fjournal.pone.0006481
for anyone who would rather watch a video than read, this topic is discussed here a long with many other benefits of fungi. 