The New York State Assembly this week voted 93 – 43 to temporarily ban a natural gas drilling technique known as hydraulic fracturing. The moratorium lasts until May, 2011, but state regulators weren’t expected to start issuing drilling permits until summer, so the legislation is largely symbolic. New York State is home to huge natural gas deposits that only recently become economically recoverable, thanks to the emergence of hydraulic fracturing technology, which is also known as “fracking.” Environmentalists oppose the practice on the grounds that it could affect groundwater supplies, although there is no credible evidence to support these claims.