Lorry-powered windmills could provide roadside energy

Long-distance lorries might not seem the most envirnmentally-friendly vehicles on the roads -- but they could soon be powering an ingenious green-power project in France. Engineers have designed a roadside windmill which runs thanks to the air set in motion by hundreds of trucks rushing past. If successful, the idea could be rolling out next to key motorways around France.Duration: 01:36