Yes it is to be expected
No, this rarely happens
Same thing happened with the cigarette controversy in the early to mid 1900's. Corporations buy scientists to whitewash facts, that's what happens.
It isnt capitalism at all, but, yeah it sucks
Of course. The obligation of a board is to maximize profits for the owners, unless they are given another objective. So unless the shareholders have told the board and CEO that the environment is more important than profits they are legally obligated to do the sleezy thing if that means more money.
Jet fuel cannot even melt steel beams and you think it can melt the atmosphere?
This is part of a bigger issue. The government is currently subsidizing these companies and with a banking system that inflates the money supply and creates companies too big to fail, their only choice is to become evil. To eliminate it we need to create much more laissez-faire laws.