But these toxic substances may raise the odds of sickness even cancer to the nearby residents.Do you guys think it is a big deal to consider this problem?

Yeah, this was back in the days when they sold leaded gasoline so we inhaled a lot of toxic fumes from the Sunoco next door I am sure but never for a minute did I think (or now do I think) the trade off was not worth it. 

Some varieties of mold are toxic and may cause adverse reactions in certain individuals.Landlord’s Disclosure (initial)(A)Presence of mold and/or moisture hazards (initial one below):______ Landlord is aware of present or past mold and/or moisture hazards in the housing unit.

Of course, the National Association of Realtors (N.A.R.) got clean away with their members steering financially illiterate home buyers into toxic Adjustable Rate Mortgages (A.R.M.).

Being in jail doesn't mean they've disappeared off the face of the planet, at least in the US.  

Rent is the best form of retirement income on the planet!

If a company performs the task it becomes a toxic by product for disposal.Generally it’s just a fact of life in old houses.

Our relationship has declined and has become pretty toxic. 

As I've said many times, property management is the most over-paid job on the planet!

Then again, I'm just about the worst fisherman on the planet so you perspective on who is going to put their boat where makes a ton of sense.