California has aggressive policies designed to address climate change, but it will need new technologies and even stricter rules to reduce its carbon footprint by 80% by 2050, according to a report. "This is quite a stringent requirement, and even if we aggressively expand our policies and implement fledgling technologies that are not even on the marketplace now, our analysis shows that California will still not be able to get emissions to 85 metric tons of CO2-equivalent per year by 2050," report author Jeff Greenblatt of the Lawrence Berkeley National Laboratory said in a statement.

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