Believe it or not, we all have to thank a bee for the food we are getting to eat. Both wild and domestic honey bees perform about 80% of the pollination occurring worldwide. A single bee is responsible for pollinating 300 million flowers each day and 70 out of 100 human food products that account for 90% of the world’s nutrition are solely pollinated by bees.What’s killing the Bee Colonies? Such an extensive amount of our agrarian profitability is reliant on the honey bees that it is no big surprise that our consideration is attracted to their plight. Over the past 15 years honey bee colonies have been disappearing, what in general is called the “bee colony collapse disorder”.   Below are some major issues and reasons causing a major decrease in the bee population –Parasites:   The Varroa mite and Nosema ceranae are some common parasites that can debilitate or even finish colonies when most of the worker bees become infected. Spores of the parasite survive on wax combs and the stored food inside states. At the point when worker bees eat these spores, the parasite attacks the covering of the digestive system. Profoundly tainted honey bees can\'t process productively and kick the bucket prior. Beekeepers use anti-infection agents and sanitization of hives to control this illness.Viruses:   As per the researches, more than 20 honey bee viruses have been identified. These viruses can affect honey bees in numerous manners, including slaughtering creating hatchlings and pupae, diminishing the life expectancy of grown-up honey bees, causing fits and quakes, lessening intellectual aptitudes, and disabling wing advancement with the goal that honey bees can\'t fly. Most bumble bee provinces have multiple viruses, and the degrees of these infections can vacillate consistently. The main treatment for such viruses is to feed the bee colony a virus-specific RNA that upgrades the honey bees\' resistant reactions to these specific viruses however these medicines just smother the viral diseases and don\'t destroy them completely. Different methodologies that are being researched incorporate rearing honey bees with hereditary protection from the infections.Bacteria:   Bacterial disease like American foulbrood is also responsible for the decrease of the bee population. This sort of infection kills young bees inside the wax cells in which they develop. This dead brood then becomes the source of spreading the infection by workers nursing brood. However, some bees detect and eradicate the diseased or infected brood which in turn stops further spreading of disease. Beekeepers use antibiotics to prevent such bacterial disease.Pesticides: Pesticides are man-made synthetic compounds intended to kill pest organisms. These pests are greatly responsible for decreasing harvest yields, ornamental plant infections, reducing animal and human health etc. These pesticides are majorly classified according to their chemical composition and usage. Framers usually begin to clean their fields without prior notice to the beekeepers. The outcome is a monstrous harming and demise of flying honey bees, and survivors regularly have nectar and dust, polluted with pesticides, which later in the winter become a reason for the death of whole families. Utilizing synthetic substances, individuals don\'t generally show the ordinary comprehension of the issue; don\'t take measures to arrange innovation and timing of defensive measures. This issue can and should be tackled at the degree of the local organization by the individual alarm of beekeepers about planning medicines of farmland.Pollution:   Honey bees feel the sting of air contamination more intensely than we do. A recent study finds that mild dirty air could kill 80% of Asian honey bees, a key pollinator in South Asia. Without such honey bees and different creepy crawlies, homegrown creation of the natural products, vegetables, nuts, and vegetables could be in danger. Over the top air contamination through mechanical emanations – harmful hefty metals and metalloids, synthetic compounds, radio-nuclides, and so forth are responsible for the bee colony collapse. The solution for this issue is conceivable just at a high managerial level – through rigorous operational control and high community attention to the executives and evacuation of mechanical outflows.   The world has over 20, 000 varieties of honey bees  with over a million of bee-hive globally. However, the above problems and several such factors are leading to the bee colony collapsing. Regardless of which species are endangered, people both in and out of the agricultural industry should perform various practices that can help preserve the much-needed pollinators.