Nexii, a company based in Canada, is getting some big backing for its sustainable, low-carbon concrete alternative. CEO Stephen Sidwell, joined Cheddar News to talk about the initiatives his company is taking to tackle climate change and scaling up production to meet demand. "Most people don’t realize it, but buildings are the number one contributor to CO2 emissions," he said. "So that's really what we're attacking, the overall CO2 emissions."