Federal MP Clive Palmer says he is willing to vote against budget bills to block the Federal Government's Direct Action climate change policy.

However, Labor says it will not support him, ruling out the possibility of it triggering a double dissolution election.

The Palmer United Party leader says Direct Action, which includes a $3 billion fund to pay polluters to voluntarily reduce their emissions, is a "token gesture", and the funds would be better spent on the age pension.

The Government says it will tie Direct Action's emissions reduction fund to next month's budget bills.

But Mr Palmer says he would be prepared to vote against the legislation.

"We'll be voting against Direct Action, whatever form it's in," he said.

"If that's what the Government wants, they can call a double dissolution [election]."

Earlier Environment Minister Greg Hunt brushed off Mr Palmer's threats, saying: "The funds will be part of the budget papers and I doubt the budget will be blocked, unless we're going to be forced into a constitutional issue".

"We were elected by the Australian people to repeal the tax, and clean up our air, clean up our land and reduce our emissions. That goal is clear and unwavering," he told ABC News Breakfast.

"We will achieve those targets. We are committed to those targets."

Mr Palmer says Mr Hunt should rethink the plan.

"Greg Hunt said that he'll link it to the budget papers but we just see that as if they're trying to blackmail us," he said.

"If he did that, we'd have to reconsider our position on the mining tax and the carbon tax."

The Palmer United Party is likely to hold the balance of power when the new Senate sits from July this year.

In a series of tweets yesterday the mining tycoon wrote:

Supporting aged pensions is more important than supporting token campaigns like Direct Action. #auspol — Clive Palmer (@CliveFPalmer) April 21, 2014

The rights of our pensioners are more important and surely have greater priority #auspol — Clive Palmer (@CliveFPalmer) April 21, 2014.

Mr Palmer has previously expressed scepticism about the science behind climate change, and in a recent interview with Lateline he said "nature" could be made to limit its carbon emissions.

Mr Hunt says the Government will treat all senators with respect.