Pollution is actually worse . . . there is more pollution than ever. Where do you live?
There's a chance he lives in Ohio, where improvements in water quality have prevented the river from catching fire since 1969. Quoting from the Wiki article:
Water quality has improved and, partially in recognition of this improvement, the Cuyahoga River was designated as one of 14 American Heritage Rivers in 1998. . . River reaches that were once devoid of fish now support 44 species. The most recent survey in 2008 revealed the two most common species in the river were hogsuckers and spotfin shiners, both moderately sensitive to water quality.
Alternately, he might be from England:
. . . the Clean Air Act [of] 1956 . . . started life as a private members bill promoted by Sir Gerald Nabarro in the aftermath of the Great London Smog of 1952. This event saw the deaths of between 4,000 and 12,000 people[citation needed] as a direct result of air pollution. The original Act was updated by the 1968 and 1993 Clean Air Acts. These Acts require that considerable areas of the UK have been declared as Smoke Control Areas where the use of solid fuel is either prohibited or only allowed in special appliances.
I'm going to assume that since I haven't in my lifetime heard of people literally dying in the western world due to smog inhalation that the situation has improved somewhat since 1952.
No, we don't live in a pristine wilderness where no industrial byproducts contaminate the natural world. Yes, there are more steps we can (and should) take to continue to reduce the impact of industry on all (esp. human) life on Earth. But to claim that we're somehow getting worse despite all of our efforts is either ignorant or delusional.
Perhaps I should ask, "Where do you live?" For what it's worth, India, China, and many places in Africa are legitimate answers if you want to hold a "pollution is worse today" position.