The Board of Supervisors unanimously passed a resolution on Tuesday urging the California legislature to institute a moratorium on hydraulic fracturing, commonly known as fracking, statewide. Fracking, a process that requires vast amounts of water to tap fossil fuels like oil and natural gas, poses myriad threats to the environment, the resolution said, including exposing watersheds to the toxic wastewater the practice produces. Fracking is also unregulated in California and the oil and gas industry has secured exemptions from fully complying with federal public health laws like the Safe Drinking Water Act and the Clean Water Act, the resolution noted. The extent of fracking in California is difficult to gauge because there are no official records of how many fracking wells exist in the state.