The issue focused on several climate models and climate models have been shown to be overly optimistic in their climate projections. Scientists have called for climate models to be tuned for climate sensitivity. Scientists have also proposed climate sensitivity for climate models to be reduced to 2°C to 4°C. According to climate scientists, climate sensitivity is the climate sensitivity that results from the climate feedbacks that occur when the climate system warms. Scientists have proposed that climate sensitivity is set at 2°C to 4°C. Scientists have proposed