How Using Honeybees is Actually Bad for the Environment.  

Effects caused by honeybees in local ecosystems

In areas with large amounts of honeybees, introduced either through farmers or hobbyists, "Individuals of 193 native bees and 1269 honeybees were counted during walking surveys of 25 patches" This research indicates that honeybees outnumber local bees 3:1. Honeybees also compete with local pollinators for previously uncontested resources. This causes a massive population decrease in local pollinators which is evidenced by research stating, "The number of nests produced by H. alcyoneus was 23% less (Wilcoxon’s T) at treatment sites than control sites." 

Honeybees also cause some plants to be less successfully pollinated, meaning the plants cannot reproduce as effectively as if they were pollinated by local pollinators. This is since honeybees are better adapted to gather nectar but also do not carry as much pollen on their bodies. This contrasts with the native bumblebee which can carry a lot more pollen, and as a result are much more effective in pollenating some plants. This is further evidenced through less fruit being produced in plants with a nearby honeybee nest. 

Honeybees also cause "...a direct negative effect on the reproductive success of a dominant wild plant." This means that honeybees cause major plants in an ecosystem to have less success in producing seeds, this also appeared to have similar results from plants that were self-pollinated, this can cause inbreeding depression. Bumblebees, however, were able to pollinate in ways that result in cross-pollination which promotes genetic diversity and allows the plants to better survive in their environment.