How have humans changed the carbon cycle? How have we added carbon dioxide (and other greenhouse gases) into the atmosphere? Write 2+ sentences. (science)

Which was an effect of the nuclear disaster at chernobyl, ukraine? people and animals did not get sick. drinking water was unsafe for a long time. forests got healthier than they had been. all the nuclear power plants in the world were closed.

Afull irb committee meeting is convened and one agenda item is a new research proposal to evaluate how mothers interact with their learning-disabled child. the inclusion criteria require the children to be a minimum of five years of age. the protocol requires the mother of the child to look at the child without any expression and not to talk to the child for three minutes. the committee determined that the mother's required task may upset the child. the irb approved the study with appropriate language in the parental permission form regarding the possibility that children might become upset. after the start of the study, the principal investigator reports to the irb that, as expected, one of the children became upset. the incident was handled according to the protocol and the child is fine. what should the irb do with regard to this report?

How did presidential reconstruction allow black codes to be passed