U.S. President Barack Obama on Wednesday signed into law a $33.5 billion spending bill to fund government energy and water programs for the 2010 budget year that began October 1.

Following are key provisions in the bill:

* Solar Energy: $225 million for research, development, and demonstration projects to make solar energy more affordable.

* Biofuels: $220 million for grants to improve production of alternative fuels such as cellulosic ethanol and biodiesel.

* Vehicle Technology: $311 million to improve fuel efficiency with better engines, better batteries and engines that burn clean, domestic fuel.

* Hydrogen Technology: $174 million to help develop hydrogen and fuel-cell technologies.

* Energy Efficient Buildings: $200 million to research conservation technologies for buildings and industry to reduce energy demand.

* Industrial Technologies: $96 million to help businesses improve energy efficiency.

* Weatherization Grants: $210 million for insulation and energy conservation measures to reduce utility bills for low-income families.

* Electricity: $172 million to research smart-grid technologies and energy storage and defend the power system against Internet attacks.

* Fossil Fuels: $672 million for research to reduce harmful emissions from fossil fuels, including $404 million for carbon capture and sequestration for coal-based activities.

* Nuclear: $787 million for research and development, including $169 million for the Next Generation Nuclear Plant.

* Nuclear Cleanup: $6.4 billion to clean up military and civilian nuclear facilities.

* Nuclear Weapons: $2.1 billion for nonproliferation activities and $6.4 billion to maintain the U.S. nuclear weapons stockpile.

* Significant cuts include nuclear waste disposal. The White House scrapped the Yucca Mountain nuclear waste repository. The bill gives $197 million, $92 million below 2009, to continue the licensing process and evaluate alternatives.

* $5.4 billion for the Army Corps of Engineers to build and maintain navigation canals and flood-control projects.

(Reporting by Andy Sullivan and Ayesha Rascoe; editing by Jim Marshall)