1. What is agent orange and why was it named agent orange? 2. When, why and where was it used? 3. Draw the structure of active components in agent orange. 4. Name and draw the toxic impurity found in agent orange. How that impurity got associated with agent orange? 5. What were some of the ill effects of impurity found in agent orange? 6. Former Ukrainian President Victor Yushchenko's name is associated with toxic impurity found in agent orange. Why?