Construction of Sydney's second airport could start by the end of next year after the latest environmental hurdle was cleared.
A draft plan and environmental impact statement released on Monday suggested fears about noise and air pollution from the airport at Badgerys Creek were unfounded.
The public will have 60 days to have their say on the federal government's preliminary plan, which includes an initial single runway with a second expected around 2050.
Provision has been made for a rail corridor but there are no plans for constructing a rail link.
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