Environmental change means the species is approaching ‘crisis point’, it is claimed.
The Scottish Government wants buildings to cut emissions as close to zero as possible.
Annie Wells MSP has called on the PM to hold a summit on the issue 'as soon as possible'.
The number of private sector businesses operating in the country has risen by more than a quarter since 2007.
The Labour-led Scottish Executive felt an inquiry 'was not the best way to proceed'.