A commercial driver's license (CDL) is a driver's license required in the United States to operate any type of vehicle. 1  weighing 26,001 pounds or greater, or any combination of vehicles weighing 26,001 pounds or greater when towing a trailer weighing more than 10,000 pounds.
The cause of drug abuse is not fully known but likely include genetic predisposition, co-occurring conditions and environmental circumstances. Drug use and experimentation is common in pre-adolescents and adolescents, but only a small percentage of those users will go on to abuse drugs.hile many people use drugs, only a small percentage abuse drugs, but it has been noted drug abuse often runs in families, suggesting genetics is one of the causes of drug abuse.
Child maltreatment affects childrenâs health now and later, and costs our country as much as other high profile public health problems. Neglect, physical abuse, custodial interference and sexual abuse are types of child maltreatment that can lead to poor physical and mental health well into adulthood. Those with a history of child abuse and neglect are 1.5 times more likely to use illicit drugs, especially marijuana, in middle adulthood (Widom et al., 2006).