Heimdal pulls CO2 and cement-making materials out of seawater using renewable energy

One of the consequences of rising CO2 levels in our atmosphere is that levels also rise proportionately in the ocean, harming wildlife and changing ecosystems. Heimdal is a startup working to pull that CO2 back out at scale using renewable energy and producing carbon-negative industrial materials, including limestone for making concrete, in the process, and […]

These baby concrete speakers aren’t as heavy as they look

To paraphrase P. T. Barnum, “there’s a Bluetooth speaker born every minute.” At no time of year is that more true than at CES in Las Vegas, where they are bountiful beyond belief. But very few — nay, only one that I found — are made of concrete. And it’s French! The speakers immediately attracted […]