As a matter of fact, the Canada Mortgage and Housing Corporation has a list of less toxic materials. Our own association has such a list on its website. We hear a lot about building materials and cleaners. It's true that carpets can release gases. The furniture here is made of pressed wood and thus contains a lot of glue. Some cleaners release toxic substances in the air.
There are buildings in Montreal with little airflow where they had to change the cleaning products they used because people were getting sick. They now use natural cleaners, and this seems to have cleared the problem.