People who are upset about something are more likely to write to their MP than people who are content about it. The result is that MP's postbags don't reflect the real balance of views in the population.

Developing renewable energy such as wind farms is essential if we are to hit our target of reducing our carbon footprint by 30% by 2015, so we need to show our MPs that we support the generation of energy from renewable sources and in particular wind. 

WinACC have written a draft letter which you can adapt and send.