The Canadian company that has set the country’s record for going from launch to unicorn status in the shortest amount of time isn’t in software. It’s not even in fintech or biotech. It’s in climate tech, and more specifically, it’s working to green the construction sector, shrinking the carbon footprint of buildings occupied by Starbucks cafes, Popeye’s, Marriott Courtyards and others. Nexii, which this month announced that it raised a $45 million round and reached a $1 billion valuation, is just one of the latest examples of a climate tech company to hit it big.