Edited sentence: "The way we will change the way we live our lives is by sharing this information about energy use," Hopper said...In 2009, he upset the privacy lobby by advocating a Big Brother-style solution to global warming, which promoted the use of surveillance technology to help lower energy consumption.Peer pressure, he said, is the key to getting people to self-certify their energy use.Sensors could be used to monitor an individual's carbon footprint, Hopper said, or track the amount of heat escaping from the roof of a building.The information would then be published online to "entice" people to change their behaviour