The Prime Minister is dismissing claims Labour will ditch the carbon Emissions Trading Scheme because of the state of the economy.
National and Labour are being challenged to say where they stand on key environmental policies.
Greens co-leader Russel Norman is concerned both parties are refusing to give commitments on the scheme.
"National is leading the race to the bottom in abandoning environment policy but Labour is giving the appearance of not been far behind in following them into the abyss. Our kids deserve better," says Norman.
Prime Minister Helen Clark says it is a complex bill that is currently before the select committee and changes will be made.
But the Greens remain concerned both parties are backsliding on the scheme.
Norman believes the scheme needs to be applied fairly across all sectors, including agriculture which he says gets subsidised by taxpayers to the tune of $1.2billion over the next five years.
The party is also concerned that National and Labour are shrinking from the introduction of regional fuel taxes.
"They are both getting cold feet about giving regional councils the ability to levy regional petrol taxes to pay for public transport infrastructure," says Norman.
The Greens believe that cutting back on public transport investments now will cost more in the future.
"We will all benefit from better public transport, not just
lower transport bills, but lower interest rates because the Reserve
Bank is increasing interest rates to try to quell inflationary
pressures coming from fuel imports," says Norman.