RAZOR: How "nature's carbon fiber" could power the green energy transition

When we talk about the transition to green energy, we also need to think about the infrastructure we're building. Is that clean and green itself?

Take wind energy for example.

The average onshore wind turbine has a capacity of around 4 megawatts. A tower that size needs around 480 metric tonnes of steel.

But producing just one ton of steel can release up to 2 tonnes of carbon dioxide. And making a tonne of cement - the main ingredient in concrete, which is used in the tower's base - can produce an equal amount of CO2.

Engineers in Sweden think they can reduce all that - by using one of nature's oldest materials - wood.

RAZOR meets the engineers behind the Wind of Change, a wind turbine tower that's made almost entirely out of wood - and is also one of the tallest wooden structures in the world.

David Olivegren, a concept engineer and co-founder of Modvion, the company that built the tower, says the idea came to him while building a boat.

CEO Otto Lundman, Modvion's other co-founder, explains how they use wood from sustainably harvested forests to make Laminated Veneer Lumber (LVL), which is then used to make modular towers that are lighter and easier to transport than steel.

And Modvion's CFO Maria-Lina Hedlund talks about how the company plans to break into a crowded green energy market.