Obama budget sticks to auctioning all CO2 permits

* Obama plan would auction all permits

* Consumer rebates possible to offset higher prices

* Cap-and-trade bill moving through Congress

By Deborah Zabarenko, Environment Correspondent

WASHINGTON, May 7 (Reuters) - President Barack Obama's $3.55 trillion budget, released on Thursday, retains his plan to cut climate-warming carbon dioxide emissions by auctioning off 100 percent of emission permits to industries.

That is at odds with some in Congress, including members of Obama's own Democratic Party, who are pushing for 50 percent or more of those emissions to be given away in the early stages of the plan to ease the transition to a lower-carbon economy.

Opponents fear that charging companies for the carbon they emit would put unnecessary pressure on an already struggling economy.

Selling all the emission permits is projected to bring $646 billion in revenue over the first years of the program, and White House budget director Peter Orszag said that would not change when more details about the administration's budget request are released next week.

"We're not going to provide the full details of what will be released on Monday, but I will say that you should anticipate no changes in our climate proposal," Orszag told reporters, when asked if the 100 percent figure would hold.