Opposition emissions spokesman Ian Macfarlane said yesterday he thought he could get The Nationals' support for amendments he is preparing for the Coalition parties' room.

They would involve agriculture, regional employment and food processing - as important to the Nationals as to the Liberals.

Senator Joyce agreed The Nationals would support amendments but they would fail because the Government would reject them.

"For the amendments to succeed would involve a complete change of heart in the process being followed by [Climate Change Minister] Penny Wong", who had already rejected the nine principles on which the Opposition amendments would be based, Senator Joyce said.

"Kevin Rudd has in mind to get to a double dissolution. It is all a ridiculous charade."

Meanwhile, the Minerals Council of Australia said that only weeks before the Senate vote, the gold sector had had no response to its March submission on possible shielding from the scheme's full tax burden.

Council chief executive Mitch Hooke said without this key advice, "it is impossible to have a fully informed debate" on the scheme's economic impact on Australia's third-largest export industry - worth $17 billion to the national economy in 2008-09.

Under the scheme, "Australia's gold sector will face a climate change tax burden of more than $810 million over the next five years, while competitors in the United States, Canada and developing nations face limited or no carbon costs", he said.

The coal industry today will launch an advertising campaign in targeted mining areas warning of big job losses if coal doesn't get a better deal. But it is not attacking the scheme itself.

Treasurer Wayne Swan yesterday refused to say if the Government would produce any more money for industries such as coal, yet he said "we are engaged in a genuine dialogue" with the community.

Mr Macfarlane told the Nine Network that tomorrow he would meet the Climate Change Department.

He wants to present an overview to shadow cabinet on Wednesday week, after when amendments will be refined for the party room.

Mr Swan told Channel Ten the G20 announcement that subsidies for fossil fuels would be phased out over time would not be an issue for Australia.

Rather: "I don't believe it has implications for Australia. It is aimed particularly at some massive subsidies elsewhere in the world, which do need to be removed over time."