West Australian Premier Roger Cook has called on the coalition and Greens to back environmental reform, but stopped short of fully endorsing the proposed changes.
The Albanese government's overhaul of environmental laws has been introduced to parliament but is yet to secure the support it needs from either the opposition or the Greens to get through the Senate.
Labor attempted reform in the last term of parliament but plans were ultimately shelved due to opposition from WA's resources sector and the state's Labor premier.
The state's support is key to the reforms getting over the line because of the revenue its resources generate for the federal government.
Strong support for Labor in WA helped the party to secure victory at the past two federal elections.
Speaking at Parliament House in Canberra, Mr Cook said concerns were still held by industry over the bill's definition of "unacceptable impact" on the environment.
The provision in the bill would allow the environment minister to torpedo projects assessed this way.
"I met with (Environment Minister Murray) Watt yesterday, and he continued to assure ... that he's working with industry to resolve issues, but also we need Greens and Liberals to basically get on board," the premier said.
"We can do this. We can produce legislation which both encourages industry and protects the environment, and I think now is the time for the parliament."
Asked if the legislation struck the right balance, Mr Cook said it was close.
Prime Minister Anthony Albanese said existing environment laws were outdated and the drawn out approvals process was costing the nation crucial projects.
"Those delays mean investors simply walk away," he told parliament on Tuesday.
"This bill is about driving better, clearer and speedier decision making, making it easier to get an answer from government sooner.
"Providing that certainty is the key to encourage investment in our economy, and every bit as important as encouraging investment in our economy is ensuring there's a better system of protections for Australia's precious and unique natural environment."
The coalition say they cannot back the changes in their current form, while the Greens say the legislation fails to provide adequate environmental protections.
Greens environment spokeswoman Sarah Hanson-Young said the minor party will be voting against the suite of reforms in the lower house.
"It has been written for the mining and forestry lobby and does nothing to guarantee protection for our environment," she said.
"It is now up to the prime minister to decide if he wants to again let mining and logging lobbyists and their political representatives like Roger Cook run the show, or if he wants to protect nature, forests and our climate."
The bill is in response to a review handed down in 2020, when Opposition Leader Sussan Ley was the environment minister.
The reforms include setting up an independent Environmental Protection Agency, though the minister would retain the final say on development approvals.
They will also remove duplication in approvals by updating agreements with the states and territories.
