Earlier this year, Exxon Mobil, as the Economist put it, "surely the world's least tree-hugging company", became the first oil giant to say it would publish details of its "stranded assets" -- the value of the oil and gas they would be unable to sell if the bottom fell out of the oil market or if tough rules about greenhouse gas emissions or carbon pricing were adopted.
This is not a Road to Damascus revelation.
Exxon is not yet a paid-up green activist, but a sizeable number of its influential shareholders are. They appear to feel that limiting their possible exposure to losses from these sorts of scenarios is worth doing. Several large shareholders have demanded explanations and actions on environmental threats.
Until recently, the corporate world treated the environment as either irrelevant or a nuisance. Now, there are local, national and international regulations to protect the environment and independent watchdogs to report on company compliance with these regulations.
Shareholders generally are beginning to organise and react. There is a network of investors called Principles for Responsible Investment, which has more than 1000 members and $34 trillion to play with. Their main concern is that climate change, or the efforts spent in trying to avert it, will damage the firms they invest in. To make proper and reasonable decisions, companies need information and so far they are not getting it.