US utility Ameren, with revenues of $6 billion operational in Missouri and Illinois, controlling 16.9 GW of generational assets, has filed a new plan that it says will allow it to become net zero on carbon emissions by 2050, it claims. It says it has followed up last year’s installation of 700 MW of onshore wind in Missouri, due to come online next year and it now plans to add 5.4 GW of wind and solar generation by 2040, and close down all of its coal-fired generation by 2042. That plan requires the spending of $8 billion over the next two decades – around $400 million a year. As usual with a utility that has a history of running on…