Grassroots resistance to the Biden administration’s ambitious push for a “zero-carbon” economy is coalescing in varied new state laws and local ordinances that threaten to bog down solar and wind development in a multi-front legal and regulatory war on a scale not seen before. Until recently and with few exceptions, squabbles pitted loosely organized local residents against renewable developers, with an average of two major projects a month facing protests and legal action in mostly rural areas, according to a database of…