Earth Hour challenge: can Hongkongers reduce their energy usage by just 1 per cent for the ...

Earth Hour challenge: can Hongkongers reduce their energy usage by just 1 per cent for the ...
- Edward Ho, chairman of WWF-Hong Kong, also used the occasion to unveil a challenge to get Hongkongers to cut their energy usage by 1 per cent across the next 12 months. This could be done through efforts such as using air conditioners less often and using more energy-efficient household ...