Nonsense. There is absolutely no question that emissions from papermills include chemicals and particulates that are harmful to human health. Whether you, personally are cognizant of it consciously is a different matter.
"Pulp and paper is the third largest industrial polluter to air, water, and land in both Canada and the United States, and releases well over 100 million kg of toxic pollution each year.[5]
Worldwide, the pulp and paper industry is the fifth largest consumer of energy, accounting for four percent of all the world's energy use. The pulp and paper industry uses more water to produce a ton of product than any other industry."
This affects each of us negatively regardless of whether we notice or are concerned.