On a former military base in Galena, Alaska, a school that houses about 200 high school students teaches sustainability among ...

A Finnish company has launched the world's largest sand battery, delivering one megawatt of heat and 100 megawatt-hours of thermal storage.

We've collated the results in the tables below. What are the different types of boiler? Find out if a combi, heat-only or system boiler is the best type for your home.