When Kodak went bankrupt many people lamented that they missed their opportunity to get into the digital camera business.

Smart people realise that was wrong. Kodak wasn't a photography company they were a chemical company. They made film and chemicals to develop them.

Large oil companies are overwhelmingly supporting the Paris Accord because they realize they are "energy" companies and as oil declines they can move their mass wealth to developing or acquiring alternative energy businesses over time. Other great successful companies do it (IBM, Netflix, every telco).

Mr Trump, and Americans, are missing a big opportunity.