Congress must approve the proposed $3.83trn federal budget, which includes a record-breaking $1.56trn deficit. The federal fiscal year is 1 October to 30 September. Congress enacted $26.4bn for DOE in 2010.

The $4.7bn in clean energy technology investments includes:

* Nearly $2.4bn, an increase of $113m, for energy efficiency and renewable energy programs including $302m for solar energy, $220m for biofuels and biomass R&D, $325m for advanced vehicle technologies and $231m for energy efficient building technologies.

*$545m