While lichen planus very rarely leads to oral cancer, irritation of lichen planus by tobacco and alcohol, poorly fitting dentures, and poor oral hygiene can turn lichen planus into the erosive type.
In economics, a deadweight loss (also known as excess burden or allocative inefficiency) is a loss of economic efficiency that can occur when equilibrium for a good or service is not achieved or is not achievable.he deadweight loss is the area of the triangle formed by the grey tax income box (to the right of it), the original supply curve, and the demand curve.
At the same time, however, the number of people affected by disasters is increasing, and economic losses are rising, partially due to the changing nature of weather-induced hazards from climate change. Economic losses now regularly exceed $100 billion annually and are projected to double by 2030.