Saving the world isn’t going to be cheap. If you sell oil, coal or old-fashioned cars, that threatens disaster. For makers of stuff like solar panels, high-tech home insulation, and efficient lighting, it’s a potential miracle. That’s the bottom line from this weekend’s climate deal in Paris, which commits 195 countries to reducing pollution in order to head off dangerous climate change. Global governments and companies are counting the costs and benefits from the agreement, which calls for wholesale transformations of energy, transportation, and dozens of other lines of business. Fossil-fuel producers and countries that depend on them face massive, costly disruption. Players in up-and-coming industries like renewable power and energy efficiency are looking at an unprecedented opportunity. “As a major oil and gas company, we are clearly at stake in these discussions,” Patrick Pouyanne, the chief executive officer of French oil giant Total SA, said in Paris. But […]