Kurzgesagt gives a detail explanation of what’s killing the bees. They discuss how bees are important to our environment, what is colony collapse disorder, insecticides, and more.
In 2015 the bees are still dying in masses. Which at first seems not very important until you realize that one third of all food humans consume would disappear with them. Millions could starve. The foes bees face are truly horrifying – some are a direct consequence of human greed. We need to help our small buzzing friends or we will face extremely unpleasant consequences.
Source: Kurzgesagt – In a Nutshell