PFAS chemicals, which don't degrade over time, have been used in consumer products since the 1950s and are linked to harmful health effects.

PFAS are chemicals that don't wear down even after being disposed. Now scientists are trying to address them before they cause human side effects.

Nov. 24 -- Bloomberg's Jack Kaskey discusses how Dow and DuPont have dealt with Dan Loeb. He speaks with Julie Hyman on ""Bottom Line."" (Source: Bloomberg)

Sept. 17 -- Bloomberg's Betty Liu, Julie Hyman and Olivia Sterns report on today's ten most important stocks on In The Loop. (Source: Bloomberg)

Oct. 29 -- Bloomberg's Trish Regan and Matt Miller report on todays top ten stocks on Street Smart. (Source: Bloomberg)

Sept. 18 -- Bloomberg's Betty Liu, Adam Johnson and Scarlet Fu report on today's ten most important stocks on In The Loop. (Source: Bloomberg)

Mar.27 -- Mark Vergnano, Chemours chief executive officer, discusses the company's strategy and outlook with Bloomberg's Scarlet Fu and Oliver Renick on "Bloomberg Markets."

Jun.03 -- James Collins, Corteva Agriscience chief executive officer, discusses the company's separation from DowDuPont Inc. with Bloomberg's Vonnie Quinn and Ed Hammond on "Bloomberg Markets."

Oct. 29 -- Trian Fund Management LP, the activist fund manager thats calling for a breakup of DuPont Co., increased its stake in the chemicals company to 2.7 percent, according to a person familiar with the situation. Betty Liu reports...

Sept. 29 -- Trian Co-Founder Ed Garden talks about what's on tap for 2017 at one of the top activist firms. He speaks at the Bloomberg Markets Most Influential summit in New York.

March 7 -- BASF SE is working with advisers and financing banks on the merits of making a counter bid for DuPont Co., the $55 billion chemical company that agreed to a merger with Dow Chemical Co. in December, people with knowledge...

July 26 -- Andrew Left, Citron Research founder, responds to David Einhorn's Greenlight Capital taking a stake in Chemours. He speaks during an interview with Bloomberg's Amanda Lang, Scarlet Fu and Joe Weisenthal on "Bloomberg Markets."

Sept. 17 -- Bloomberg's Adam Johnson reports on today's top headlines on Bloomberg Surveillance.

British Minister of State for Commonwealth Relations Mr Cledwyn Hughes is interviewed on the situation in Southern Rhodesia following his recent trip to Salisbury (Harare). Questions include asking for his personal view of the...

CLEAN : Paris prima ballerina Aurelie Dupont bows out

Nov. 17 -- Bill George, former chairman and chief executive officer at Medtronic, questions some of the companies being targeted by activist investor moves. He speaks on Market Makers.

Rhodesian Premier Ian Smith gives interview.

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Sept. 14 -- Bayer AG agreed to purchase Monsanto Co. after submitting its fourth bid for the company. There is a $2 billion break-up fee attached if the $66 billion deal gets rejected due to antitrust concerns. Bloomberg's Jeff McCracken...

Sept. 6 -- Bayer AG sweetened its takeover bid for Monsanto for a second time, increasing the amount to $56 billion. Monsanto says it is evaluating the offer as well as other proposals. Bloomberg's Jeff McCracken has the details on...

Sept. 14 -- Bayer AG agreed to purchase Monsanto Co. after submitting its fourth bid for the company. The deal is valued at $66 billion and would create the world's largest supplier of seeds and pesticides. Bloomberg's Jeff McCracken...

French right wing independent presidential candidate Nicolas Dupont Aignan holds a campaign rally in Paris presenting himself as the only alternative to Francois Fillon

Sep.13 -- Howard Ungerleider, Dow Chemical Co. president and chief financial officer, discusses the new streamlined Dow companies with Bloomberg's Ed Hammond on "Bloomberg Markets: The Close."