21.   Hamilton was also charged with driving an uninsured car and driving under the influence of a controlled dangerous substance.

22.   In the days before fume hoods sucked away dangerous substances, a process called mercury gilding used to kill off conservators regularly.

23.   Inside the building a fine layer of soot covers everything, samples of which have turned up high levels of dioxin and other dangerous substances.

24.   Laws require fuller public disclosure, and many companies have found alternatives to their most dangerous substances or reduced stockpiles, experts said.

25.   Miners and glassworkers inhale dangerous substances.

26.   No criminal charges were filed, even though the removal of the dangerous substance from the laboratory violated state licensing requirements.

27.   Persistent organic pollutants are among the most dangerous man-made substances released into the environment each year.

28.   Possibly dangerous substances could be formed.

29.   Rail companies and business groups say companies could collapse under an avalanche of possibly spurious claims if mere exposure to dangerous substances can be grounds for a lawsuit.