Bob Brown has thrown his support behind the campaign against the desalination plant near Wonthaggi.  The Greens leader will fly down to the Bass Coast site for a protest rally today.

The rally against the $3.1 billion plant will be addressed by Senator Brown and Greens lead Senate candidate in Victoria Richard Di Natale.

Greens environment spokesperson, Greg Barber MLC said: "The Bracks government's proposal for desalination is reportedly for a 150 000 ML plant at a cost of $3 billion dollars. Based on past estimates*, that would generate around 1 million tonnes of CO2."