Discuss the epidemiological health data that suggest toxin from Albert tar sands are responsible for brain tum ours and cancer.

Methodology critique for statistics class quality of life and functional status of lung cancer surgery patients.1-Introduction: provide a brief synopsis of the subjects under discussion.2-Definition of concepts related to these subjects: for example the definition of cancer,free radicals and how they affect the normal functioning of the body.Antioxidants:sources,how they work,benefits