Whose environment is much more polluted. In the developed world, pollution is decreasing. For the U.S., for example: https://gispub.epa.gov/air/trendsreport/2024/
There are lots of other new chemicals not shown on that chart that are in our food and clothes and everything, particularly almost everything modern babies in the US come in contact with.
There's also a lot that was never stopped, and more and more coming all the time.