Public comment is being sought on Western Australia's largest marine park - the 1.8 million hectare proposed North Kimberley Marine Park.
Environment Minister Albert Jacob said the proposed park would be the second largest State marine park in Australia behind the Great Barrier Reef Coast Marine Park and seven times the size of Ningaloo Marine Park.
Mr Jacob said its creation would be a significant milestone towards conserving the unique northern environment, while providing jobs and management opportunities for traditional owners and supporting growth in environmentally sustainable tourism.
"While this expansion is significant in its own right, it is the multiple benefits that flow from the new park that is most important," he said.
"The creation of this park provides an exceptional conservation outcome as well as opportunities for growth in tourism."
The proposed park will increase the total area of the State's marine parks and reserves by more than 70 per cent.
The State Government has announced one of the biggest red tape cuts to the environmental planning approval process ever undertaken in Western Australia.
The draft Perth and Peel Green Growth Plan for 3.5 million has been released for public comment.
Premier Colin Barnett said the plan would secure Federal environmental approvals upfront to provide certainty to development and conservation in Perth and Peel for the next 30 years.
Australia's oldest conservation legislation will soon be replaced with the introduction of a modern, updated Bill to State Parliament to conserve Western Australia's environment.
Premier Colin Barnett said introducing the Biodiversity Conservation Bill 2015 was a momentous step forward in the conservation of the State's biodiversity.
"This long-awaited new legislation will replace the outdated Wildlife Conservation Act 1950 and significantly improve the Government's ability to protect native species and important biodiversity assets," Mr Barnett said.
"Successive governments have been trying to update these laws for many years so this is a very significant achievement with new biodiversity conservation laws being introduced for the first time since the 1950s.
"Western Australia's south-west is one of 35 globally recognised biodiversity hotspots with flora and fauna found nowhere else. This legislation ensures these values are appropriately recognised."