Climate change: 'Default effect' sees massive green energy switch
When Swiss energy companies made green electricity the default choice, huge numbers of consumers were happy to stick with it - even though it cost them more.
Four years after the switch, researchers found that around 80% of customers were still on green tariffs.
This "default effect" happened partly because people didn't want the hassle of switching back to fossil fuels.
The authors say the idea could have a big impact on global emissions of CO2.
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In the study, the researchers looked at what happened when two Swiss energy suppliers changed the default electricity offering for their customers from a mixture of fuels to renewables only.
This change affected around 234,000 private households and 9,000 businesses.
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