The $300 million carbon tax lifeline for the steel industry will have to wait for the Green light from Bob Brown's party before it becomes a certainty.Prime Minister Julia Gillard promised the money on Sunday under a steel transformation plan which would cover the carbon tax costs of Australian steel producers.Port Kembla-based BlueScope would receive about $180 million over four years, an outcome chief executive Paul O'Malley said "satisfied" him.But in an attempt to wedge the Opposition yesterday, the Greens and the Government said it was up to Tony Abbott to support the package through the Parliament.Mr Abbott said it was "a bad deal for the steel industry" and the Opposition would vote against all the Government's carbon tax legislation."The best form of compensation for the steel industry is not to have a carbon tax in the first place," he said.Greens leader Bob Brown suggested it could be months before a decision was made, and said he would come to Wollongong to talk to steelworkers.‘‘[It’s a] difficult situation for the Greens because the steel industry has not been one of our biggest supporters,’’ he said.‘‘But that doesn’t matter, there are jobs. We are concerned about the steel industry.‘‘And I’m saying this to Tony Abbott - if you are going to let down that part of your constituency, I’ll go and talk to the steel industry.‘‘I’ll go to Whyalla, I’ll go to Wollongong, to meet workers in the steel industry. We’ll look at options for the steel industry in the coming months.’’The $300million scheme was not part of the carbon price deal negotiated in the Multi-Party Climate Change Committee, and will need special legislation to become a reality.The Greens would not support the money being spent from the $10.2billion raised from the carbon tax. This casts doubt on whether they will support it separately.Greens deputy leader Christine Milne said she needed more information to make a final decision.‘‘The Greens are waiting for the Government to provide full details of the steel package,’’ she said.‘‘But we are certainly aware of the stress of the industry and our focus will be on maintaining jobs.’’Mr Combet’s office has been unable to say when it will finalise details of the scheme.