They can be cured, so not necessarily 'dying' as Wiggs stated, but all the toxins, pollution, pesticides, radiation, and other chemicals are not helping and arguably increasing chances of developing illnesses.
A person who smokes cigarettes is more likely to get lung cancer. What about the people living in smog filled cities who are constantly breathing fumes from vehicles, factories, etc. ?
In China they have to close school on some days due to the toxic levels of smog.
If you read my responses, you will see that I don't disagree that there are more toxins today then there was in the past. There was a time when people mainly had used coal as fuel for heat. In those days, everything was covered in layers of black soot. Some say black squirrels were black as self preservation since they could more easily hide in the soot.
Once soot enters your blood stream, it can cause a wide array of serious health issues, including respiratory issues, shortness of breath, bronchitis, asthma, stroke, heart attack, cancer, and premature death.