Industrial hygiene

watch this video ( A Dangerous Business Revisited ) and then write a 700 word about: 

- A brief summary about the video ( including the other companies that mentioned in the video).

_ your opinion and thoughts about the video, how did it make you feel. 

- what the company are doing now and did they solve the problem or not. 

the video: 

http://www.pbs.org/wgbh/frontline/film/mcwane/