As part of our drive to proactively reduce our carbon emissions, Mirius has programmed our computers to ‘sleep’ upon inactivity. We have calculated the energy and cost savings across the company because of this minor measure. Energy requirements of computers in sleep mode are a fraction of that consumed during normal usage. Applied to all site-based company computers, we estimate reduction of carbon emissions equivalent to the weight of an adult giraffe, that is, around 1000kg. Across the period of one year cost savings are significant presenting a valuable outcome from a simple adaptation to practice.