Which of the following was not an ecological consequence of point source pollution from the Sudbury Smelters in Canada? a.
heavy vegetation loss in the 96 square miles surrounding the factory
b.
the devastation of surrounding forests by acid rain
c.
toxic releases in the groundwater supplies
d.
changes in soil chemistry due to heavy metals
e.
soil erosion

In an experiment examining the effects tai chi on arthritis pain, callahan (2010) selected a large sample of individuals with doctor-diagnosed arthritis. half of the participants immediately began a tai chi course and the other half (the control group) waited 8 weeks before beginning. at the end of 8 weeks, the individuals who had experienced tai chi had less arthritis pain that those who had not participated in the course.