Mr. mckay teaches about 100 students in his senior english classes in a large high school. if his students match the national norms for twelfth graders, how many of his students probably used marijuana, alcohol, or other illicit drugs in the past 30 days? a. 25 b. 15 c. 20 d. 10

Click on  the link  to view information gathered by the organization keep america beautiful. read "the costs of american littering" to find three negative effects of litter in local communities.  based on your research, what are the negative effects of litter in local communities? check all that apply.litter cleanup is very expensive.litter has decreased since 1969.litter is a constant community problem.litter causes property in the community to be less valuable.litter contaminates water and has other environmental consequences.