Bitter Harvest (1981 film)

Bitter Harvest was a 1981 television docudrama about an accidental poisoning of cattle feed in the Midwest in the 1970s. Its plot is based on the 1973 Michigan PBB contamination incident.

Dr. Freeman responds to De Vries request for help and identifies the blip on the chart as Polybrominated biphenyl PBB, a flame retardant used in Firemaster extinguishers. At last the answer is in his hands.De Vries is surprised to find Dr. Freeman visiting him the following morning, but the doctor has been doing further research into PBBs. Exposure symptoms match what they already know, and include memory loss and possible cancer. They find that the substance that has poisoned his livestock can be passed on to humans by eating beef and drinking milk. This is clearly shown by his familys poor health. His wife can no longer breast feed her baby, as that too would pass on any PBB she has in her body. The substance is stored in body fat and is cumulative. Its firmly in the food chain, and the longterm effects are uncertain, as there is no known way to remove PBB once it has been ingested. ........

Source: Wikipedia