As a building surveyor specifying refurbishment work on houses, I am given the perfect opportunity to make small changes, and it's the small changes that count.With private houses accounting for such a large percentage of CO2 emissions, any changes are beneficial. I specify low energy light bulbs and ultra efficient boilers. When budget permits, we invest in all natural roof insulation and specify FSC wood on all the projects. I am involved in a discussion group with a local council to get more self-generated energy into the area. And of course, I write via Greenpeace's website to the government, etc.