There really should be an "all of the above except D" option because all of these things happened to a certain extent during this time except <span>the resolution of the problems of Palestinian refugees.</span>
The presidents most important is other characteristics can be business or the laws the president makes, how the president wants to make sure the world is okay and is on track. no conflict on wars or any nuclear wars starting. a president that is fair, with equality, of religion, points of views and etc
Pollutants is the general term.
Chemical pollutants. Waste pollutants. Chlorofluorocarbons