Need a link or a precise cite. Otherwise, no. 
And my comment reference all people, not just Americans, because all lives matter, not just American lives, not including bunches of cells.  Or if they do, then according to your logic, I'm sure billions of "potential "humans" have died through miscarriage, menstruation from failure to conceive and sperm wasted by young and old men alike through the ages. Hitler killed 6 million Jews.  Your numbers are off, way off.  Billions have died at the hands of humans alone, directly or indirectly. https://en.m.wikipedia.org/wiki/List_of_wars_and_anthropogenic_disasters_by_death_toll

As for what pollution etc has to do with the subject, people die from human-caused pollution. See link, above.  They die from human-caused starvation, and disease and human failure to act or by acting in ways that promotes deathly actual living, breathing humans.