Bees are awesome!!! My parents have more then 100 hive and I grew up loving these wonderful creatures! The population of bees are declining due to many factors, as you said.
An other important factor that contributes to their decline is the cultivation of GMO plants that have very low nectar and pollen, so bees don't have enough food.
Hope that soon many will realize how much harm we are doing to the whole planet and implicit to us.