1 The primary cause of COPD is tobacco smoke (through tobacco use or second-hand smoke).  The disease now affects men and women almost equally, due in part to increased tobacco use among women in high-income countries.
Swarming is the process by which a new honey bee colony is formed when the queen bee leaves the colony with a large group of worker bees. In the prime swarm, about 60% of the worker bees leave the original hive location with the old queen. This swarm can contain thousands to tens of thousands of bees.
The drone honeybee is the only male resident within a colony of bees. At the beginning of a spring season their population is often below one hundred, with a healthy hive often not having a population greater than a thousand. A good approximation dictates that about 15% of the hive's population is made up of drones.