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.
Usually bees collect pollen from entomophilous plants that produce and the nectar. But in some periods of the season (especially in the early spring) when the honey plants are not yet in bloom or very few of them are in bloom, bees take this food from wind-pollinated plants.