There are fears major environment reforms will do little to tackle a growing backlog of renewable energy projects ahead of a possible deal on the laws.

The federal government is hopeful of reaching an agreement with the coalition or the Greens to get the overhaul of Australia's environmental protections through parliament before Christmas.

The legislation aims to speed up approvals for some critical infrastructure, housing and energy projects while also improving protections for natural sites.

Opposition Leader Sussan Ley said the coalition was seeking "sensible" changes to the 1500-page bill.

"We want the laws to work for business, industry and of course the environment, which needs protection," she told Sky News on Friday.

Ms Ley threatened to vote against the laws and resume negoti

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