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Australia's Climate Institute is calling on the business community there to reveal its position on carbon pollution reduction targets.
Campaigners say business leaders should announce how much they think Australia should reduce its carbon emissions by 2020.
They have written to the Australian Business Council and placed adverts in several major newspapers.
Climate Institute CEO John Connor says business leaders should come clean before the Federal Government announces Australia's carbon pollution reduction targets in December.
"It's important that Australia keeps up the ambition for the targets which Garnaut and others have set is in our interests, which Treasury has said that we can afford economically," he said.
"It's now time that we have business being up-front about what they want for the long-term health of the planet.
"After almost decades of delay from many business leaders, many now accept the science but they're not accepting or coming clean on what they see as the long-term objectives."
Scientists are calling for a 25 to 40 per cent cut.
The Federal Government is due to announce Australia's carbon pollution reduction targets next month.
- RADIO AUSTRALIA