Which of the following is not a way in which trees benefit the environment?
a. they remove a significant amount of carbon dioxide from the atmosphere.
b. they remove a significant amount of oxygen from the atmosphere.
c. their roots hold soil in place, reducing rates of erosion.
d. they remove ozone and particulates from the atmosphere

The specific department of health and human services (hhs) regulations that apply to research with children are known as: subpart b: additional protections for children involved as subjects in researchsubpart a: the common rulesubpart d: additional protections for children involved as subjects in researchsubpart c: protections for children in research