Concrete has a huge carbon footprint. Researchers at MIT in the USA have now developed a method to make its production more climate-friendly. The secret ingredient: baking powder.

The architect and structural engineer Francesco Ranaudo is researching how precast concrete ceiling slabs can be manufactured thinner, lighter, and in a more sustainable way. To achieve this, he is utilizing both 3D printing processes and techniques of master builders of old.

Many bridges are getting on in years and need renovation. Empa has optimised a strengthening method that allows concrete to withstand 77 percent more pressure.

Road pavements require bitumen as a binder. But its production has many disadvantages. Empa researchers are now experimenting with string, which holds gravel together without the need for concrete - and is also more flexible, more permeable to rainwater and more environmentally friendly.