If there's an enduring truism about corporate promises to do well by doing good, it's that believing them is a mug's game.
Latest case in point: The promise by some of our largest fossil fuel companies that they would be in the forefront of the transition to renewable energy.
In the last few days, two of the companies that made the most grandiose promises, BP and Shell, have backed away from their pledges about investments in renewable sources such as solar and wind.
