The Environmental Protection Agency (EPA) has announced that California has failed to submit necessary elements of the State Implementation Plan (SIP) for controlling ozone pollution in San Diego County, as required by the Clean Air Act. This failure relates to the implementation of required technology for reducing emissions in this region. As a result, sanctions may be imposed if the state does not resolve this issue within a set timeframe. The EPA has determined that these sanctions include limits on development activities and federal highway funding if not resolved within 24 months.
Simple Explanation
The EPA told California that it didn't do what it was supposed to do to help clean the air in San Diego. If California doesn't fix this soon, it might have to follow stricter rules, and there could be less money to spend on big roads.