The California Energy Commission has allowed more time for funding for a $ 4 m grant funding solicitation , intended to encourage the research and development of natural gas engines , specifically those for medium - duty and heavy - duty off - road vehicles . Applications can now be made until Monday 19 December . The effort has been made to reduce nitrogen emissions in the polluted areas of California , namely the San Joaquin Valley and the South Coast air basins . Off - road vehicles are a significant source of nitrogen emissions , particularly heavy duty ones .
The California Energy Commission has allowed more time for applications for a $4m grant funding solicitation, designed to encourage the research and development of natural gas engines, specifically those for medium-duty and heavy-duty off-road vehicles. Applications can now be made until Monday 19 December. The solicitation has been made to reduce transportation emissions in the polluted regions of California, namely the San Joaquin Valley and the South Coast air basins. Off-road vehicles are a significant source of nitrogen dioxide, particularly heavy duty ones.