Jennifer Wagner is the president of CarbonCure, the Dartmouth-based company on a mission to reduce greenhouse gas emissions in the construction industry. It has developed a system to inject carbon dioxide into the mixing process. The Co2 is converted into a mineral, makes the concrete stronger and reducing carbon emissions. Through venture capital funds, CarbonCure has received investments from Amazon, Microsoft, Bill Gates and Michael Bloomberg. And Amazon is also a CarbonCure customer, using the technology in the construction of its new buildings.