A backfire is when the ignition of fuel doesn't take place in the ignition/combustion chamber, it(a backfire) can take place in the intake or exhaust. It can â¦ be caused by a fuel to air ratio not being correct, also if the timing of the spark is not just right that could cause it to back fire.
Melanoma in the United States. From 2005 to 2009, the median age at diagnosis for melanoma of the skin was 61, and the median age at death was 68. The age-adjusted incidence rate was 21.0 per 100,000 men and women per year.
Even though malignant melanoma is diagnosed far less often, MM takes more lives than any other type of skin cancer, causing about 7,600 deaths per year. That represents about one malignant melanoma death every hour. Malignant melanoma is responsible for 80 percent of all skin cancer deaths. The primary cause of all types of skin cancer is exposure to ultraviolet radiation (UV) â the sun. It is easy to get a sunburn because of the many opportunities to work and play out of doors.