Building with wood, straw, and hemp. Biobased materials are seeing ever more use in the construction sector, which needs to become more sustainable as it is one of the major sources of soil, air and water pollution.

Additive manufacturing, or 3D printing, is a major part of the fourth industrial revolution and it will transform the construction sector, according to Zoubeir Lafhaj , an expert in the future of construction, from the graduate engineering school École Centrale de Lille, in France.

The green building phenomenon in Latin America has taken off. Bio-based aggregates have started penetrating the construction sector’s market, and the development of eco-friendly renewable products has increased the use of bio-based polymers in the construction industry, as a recent study shows.

Bristol is at the forefront of high-tech innovation in the UK, named European green capital in 2015. But it is also the second least affordable major British city housing-wise only after London.

Researchers in the US have developed bio-based air filters that they claim can capture toxic chemicals that current filters can’t.

A relatively recent interest in hemp as a building material responds to a global trend that encourages the development of bio-based products and the reduction of carbon emissions.

Hemp is getting more attention for its multiple uses in sustainable building . In the US, former Asheville mayor Russ Martin and his wife Karon Korp, built the first hemp house in 2010 using crop imported from the UK .

Mark Miodownik will never forget the day he became obsessed with materials. He was a schoolboy in 1985 when he was stabbed in the London Underground. “ When I saw that weapon in the police station later, I was mesmerized.

The Cuarto de Marzo district of Valladolid, Spain , is an area spreading over 21,000 square metres with 166 residences. It is now the focus of a retrofitting project , called  R2CITIES , funded by the EU.

Making buildings more energy efficient is part of the European strategy to combat climate change . One of the aims of the EU-funded project Direction —due to be completed by 2016—is to demonstrate that  very low energy buildings can actually be implemented in practice .