Family First Leader Senator Steve Fielding has today written to all senators asking them to look closely at the science before casting their vote on an emissions trading scheme.
Central to Senator Fielding's doubts are the trends in global temperatures over the last 15 years, which he says are not in line with the increase in global carbon emissions.
In his letter he sets out a chart based on IPCC figures, which shows that over the last 15 years carbon dioxide emissions have increased, while global temperatures have remained steady.
"This runs counter to the assumption underpinning the CPRS which says that increasing carbon dioxide emissions are the leading cause of global warming," Senator Fielding said.
"Given the Rudd Government has failed to explain this obvious contradiction I can't understand how any member of the Australian parliament can vote for an emissions trading scheme.
"I find it incomprehensible that we’ll be voting for this scheme and going it alone before the rest of the world acts.
"Kevin Rudd and Penny Wong are hanging the Australian economy out to dry if the rest of the world doesn't follow suit."