Could carbon-capture technology be a silver bullet to stop climate change?

Few companies specialize in carbon removal and the tools they produce are currently still expensive

Peter Fiekowsky, a physicist and entrepreneur, hates silver bullets.

But at a climate summit in California last month he found himself pitching one. In partnership with the company Blue Planet, he was demonstrating a low-tech-looking machine that can pull carbon dioxide from the air and store it in construction materials.