The federal government has released figures to try to shut down growing calls from the opposition to consider nuclear power as part of Australia's future energy mix. Key points: Opposition Leader Peter Dutton has described nuclear power as the "most credible" pathway to reduce emissions Opposition Leader Peter Dutton has described nuclear power as the "most credible" pathway to reduce emissions The government's current plan is to invest in clean energy projects at a cost of $20 billion The government's current plan is to invest in clean energy projects at a cost of $20 billion Energy Minister Chris Bowen says…