“Left out earthquakes, bad breath, global warming, and liberalism. This is demonology, not science.”
Science has reached the point where we can find a single molecule of something if you look hard enough. What we don’t know is whether it would have been there in 1918 or 1227. Our bodies are so large compared with the usually insignificant amounts of man made materials that the materials would most likely never have an effect. Also, our bodies are marvelously self-repairing.
These guys would probably have us ban everything man made. When I pointed out to a liberal that banning DDT had led to the deaths of a billion people (through the spread of insect born disease) he said, “Good. It’s better for the planet that they died.” That was my final conversation with him. Life is too short to converse with people who want us all to live in the Stone Age for the good of the planet.
This is, of course, why humans continue to liver longer, one of the few purely objective standards of changes in health we have.
Next time, arrange to have this conversation in front of a few of his liberal friends. When he uncorks that line, snarl at him, "RACIST! I'm never speaking to you again" and stomp off.