Well he was certainly after a result he wanted, lead was phased out of house paints starting after 1971 and gone by 1978, meaning anything built before 78 was s

Well he was certainly after a result he wanted, lead was phased out of house paints starting after 1971 and gone by 1978, meaning anything built before 78 was suspect. This may still be a problem in some older housing especially in cities. Leaded gasoline didn't fully phase out until the 80s and was still for sale in places until 91. Even in Canada leaded gasoline wasn't banned until 1990. So while it definitely had a large influence we have to realize lead was everywhere, it was cheap, it had so many wonderful uses, but it most certainly didn't vanish in the seventies.