As we reach the end of the first week exploring the carbon revolution, here are 10 highlights from our research so far including carbon-neutral concrete and machines that suck CO2 out of the sky.

Carbon-neutral concrete
Montreal company Carbicrete is exploring ways of using industrial waste to create carbon-neutral concrete, potentially offering a solution to the huge carbon footprint of the cement industry, which is responsible for an estimated eight per cent of anthropogenic CO2 emissions.
"We're taking CO2 out of the system every time we make a block," Carbicrete CEO Chris Stern told Dezeen.
Read our interview with Stern ?

Olivine sand
Dutch designer Teresa van Dongen has created a library of products that capture atmospheric CO2, including olivine, an abundant mineral that can absorb its own weight in carbon. "It absorbs CO2 very easily," van Dongen told Dezeen. "One tonne of olivine sand can take in up to one tonne of CO2, depending on the conditions. You just have to spread it out and nature will do its job."
Read our interview with van Dongen ?

Direct air capture
Swiss startup Climeworks builds direct air capture machines that suck CO2 out of the sky. The greenhouse gas can be buried underground or is in products including fuels, foods and construction materials.
"We capture CO2 from the atmosphere," said Christoph Beuttler, head of climate policy at Climeworks. "We're mining the sky because there's too much carbon ...