By Francis Menton
Anybody who looks with a critical eye at the madcap push toward increasing amounts of intermittent renewable electricity generation in the U.S. and Europe quickly realizes that eventually this has to hit a wall. But when will the crunch come? Theoretically, with 100% fossil fuel backup you can keep an electricity system of majority renewables functioning indefinitely, albeit with consumers bearing the unnecessary costs of two fully redundant generating systems. But then politicians pledge to reduce and then eliminate the fossil fuel backup, and by dates that are rapidly approaching. Backup plants get closed and decommissioned. For how much longer can this really keep going?