Will the Norwegian decision make a real difference to coal miners or energy providers? Perhaps. It’s unknown how much of their assets are in companies that meet their divestment criteria. The figure could be substantial, in which case the downward pressure of the share price would lead to corresponding pressure from shareholders on bosses to get out of coal and into cleaner fuels...The pressure from investors like Norway, while potentially significant and growing, is far gentler. It’s a reaction to a coming change, rather than the cause of it. Whether it will be enough to encourage the energy sector to reform itself before regulation forces it to remains to be seen.