I think they're mostly talking about situations where companies find out that whatever they're producing or researching has negative impact towards either the environment or the populace and the company buries the evidence of said negative impact to protect the business. One example is how Syngenta has attempted to silence Dr Tyrone Hayes when he discovered that the chemical Atrazine, which Syngenta produces, is an endocrine disruptor that is negatively impacting wildlife in areas where the atrazine has been applied and washed away into local water sources.