California must substantially increase its use of advanced biofuels to meet its goal of reducing greenhouse-gas emissions to 80% below 1990 levels by 2050, according to analysis by the California Council on Science and Technology. The council also found that meeting the state's goal of 75% in-state biofuel production would be difficult. Residual biomass and "purpose-grown energy crops" can provide a substantial amount of in-state feedstocks, but "judicious use of such feedstocks will be required to obviate long-term sustainability concerns and maximize efficient resource management," said the report's lead author.

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