After working all of his life as a sound technician for the Bulgarian state television, Emil is now retired. He lives in a 120 square meter house in Gorni Lozen, a village not far from Sofia, but only uses its ground floor and basement because he can’t afford to heat the whole of it.

María Regidor co-owns a mini-hydro power plant in Spain, which produces part of the electricity provided to the residents of the Castile and León region.

Forming attitudes is hard. It may be exciting to start a new habit, but it’s challenging to make it stick. This may often happen when we try to go green, consume less energy and constantly follow virtuous behaviours in the buildings where we live and work.

Buildings and the construction sector are responsible for over one-third of global final energy consumption and nearly 40% of total direct and indirect CO 2 emissions .

Peer-to-peer (P2P) platforms allow energy sharing and trading within a community without the binding mediation of the traditional big utilities.

If energy-saving measures came knocking at the door, wouldn't it be reassuring to have someone on hand to help you navigate the benefits and inconvenience, someone to help dispel your doubts? This is what is happening in Zaragoza, Spain, where social workers are helping the dwellers of a block of council flats.

Thirty-one apartment buildings comprising 140,000 m 2 of floor space: Europe’s most ambitious energy-saving renovation project is transforming Torrelago, a residential district of Valladolid in central Spain.

For most of us, any concerns about computing speed or data storage are usually to make it go faster while storing more. We hardly ever think about the enormous amounts of energy already required to power Internet servers or charge the increasing number of devices we own.

Local governments in Europe are notoriously risk averse, city council officials and industry leaders won’t hesitate to tell you.

Just imagine: you get back home one evening, unlocking your door with the torch light of your mobile. You sit down on your sofa, download a film 100 times faster than currently possible and enjoy the movie on a fully secure wireless connection.

Crowdfunding is considered by some experts to have the same effect on banks as Uber has on taxis. Green energy crowdfunding is no exception: the process is 100% digital and lets everybody become an investor or request funding for a sustainable project, without going throughthe banks.

There is growing interest in crowdfunding as an alternative way to support projects focused on renewables. This comes at a time when the green energy sector is feeling the purse strings tighten in many European countries.

In 1961, the physicist Rolf Landauer formulated a principle that any transformation of information that takes place in a computer requires energy, thus making zero-power computing a pipe dream.

Only when they are accepted, or better even embraced by the people, they can be implemented swiftly without any  major delays.

A book of learning experiences, in which every chapter is explained through a piece of art. The theme: the transformation of CO 2 into something useful, using man-made diamonds.

Can “cryptocurrencies” encourage green-tech? Nowadays virtual means of payment are in use as an alternative to our existing currencies.

This year’s EU Green Week is clear in its focus: “green jobs for a greener future.” It’s highlighting how environmental policies are helping to create new work opportunities and a demand for new types of competences.

Just because your home was built in the 1950s or 60s doesn’t mean it can’t be green. Retrofitting – the process of modernising properties using the latest technologies – can save energy and reduce CO 2 emissions.

The pioneering city of Stuttgart, Germany, was one the first to apply an innovative financing scheme back in 1995 and since then it has been bearing its fruit: energy-efficiency funding has reduced the city’s CO 2 emissions by tens of thousands of tonnes.

Do young people know what a smart city is? Do they care about saving energy and preserving the Earth’s resources? “Rooting sustainability starts on the benches of schools,” affirmed UNESCO director-general Irina Bokova at the recent UN Climate Change Conference ( COP22 ) in Marrakech, Morocco.