According to HCVA, a classic car generates 563kg of C02 a year, which equates to 20pc of the emissions from powering a computer for a year.
2.5 tonnes of CO2 for one computer for one year? Actually, closer to 3 tonnes. The UK average emissions per capita are only just over 5 tonnes I think that’s without counting imported and embedded emissions.
A complete desktop uses an average of 200 Watt hours (Wh). This is the sum of the average consumption per hour of the computer itself (171 W), the internet modem (10 W), the printer (5 W) and the loudspeakers (20 W). Assuming that a computer is on for eight hours a day, the annual consumption comes to 600 kWh. That corresponds to CO2 emissions of about 175 kg per year, i.e. 1.75 % of the average annual emission of a Belgian.
A laptop uses considerably less: between 50 and 100 Wh that it is on, depending on the model. If it is used for eight hours a day, consumption therefore varies between 150 and 300 kWh/year. That corresponds to CO2 emissions of between 44 and 88 kg per year (or between 0.44 and 0.88 % of the average annual emission of a Belgian).
Someone, somewhere, is spouting bollocks, aren’t they?