Save energy in your house, both for yourself and the world

I have no interest in politics, so what I write is all about technology innovations.
Today's topic is about how to monitor the energy consumes in your house and how to save it, and what does the save mean to your.
Giving people the means to closely monitor and adjust their electricity use lowers their monthly bills and could significantly reduce the need to build new power plants, according to a yearlong government study.
The results of the research project by the Pacific Northwest National Laboratory of the Energy Department, released Wednesday, suggest that if households have digital tools to set temperature and price preferences, the peak loads on utility grids could be trimmed by up to 15 percent a year.
Over a 20-year period, this could save $70 billion on spending for power plants and infrastructure, and avoid the need to build the equivalent of 30 large coal-fired plants, say scientists at the federal laboratory.
The homeowners could go to a Web site to set their ideal home temperature and how many degrees they were willing to have that temperature move above or below the target. They also indicated their level of tolerance for fluctuating electricity prices. In effect, the homeowners were asked to decide the trade-off they wanted to make between cost savings and comfort.
I like this idea!
From this idea and work, I can see that there are always many people having time to do what they like!