Detroit - As the Texas power grid shudders in part under renewable power, the auto industry is also facing an uncertain transition to green energy. General Motors dropped a bombshell last month that it will build only electric vehicles by 2035. The commitment comes as the Biden administration stocks up on climate activists to?transform the economy to fight global warming.The administration is in line with governments from Europe to China that have declared EVs the future and - for the first time - are mandating which powertrains automakers must use.But as GM and other automakers spend billions to bring electrics...