"A while" being defined as what? 5 years, 10, 15, 20? I don't think that companies this large (and dependent on their product) can change their business plan in

"A while" being defined as what? 5 years, 10, 15, 20? I don't think that companies this large (and dependent on their product) can change their business plan in whatever your contrived timeframe is. I'm not defending the oil companies, but I defend the cost of change, the time to do it, and the demands still upon them to produce their main product: oil. Can we expect the companies to shift production to something other than oil? In fact, as we became more and more aware of human-influenced climate change, we LEARNED what caused the problem. It's easy to look back on when we first really determined humans and the biggest cause of climate change, and judge them based on what we know NOW. Taking 2017 knowledge and applying it to 1997 by saying "they've had a long time to fix this" is disingenuous armchair quarterbacking at worst.