Oreskes’s major points about the merchants of doubt

What are Oreskes’s major points about the “merchants of doubt” she describes? How were a handful of atomic-age scientists able to create doubt and halt protections on issues as diverse as tobacco smoking, acid rain, pesticides, and climate change? What were the chief strategies, and how will these be best addressed in future? What are some other examples of this kind of obfuscation that you see in the news recently?