Leaky homes and buildings are some of the greatest climate offenders, but a Dayton, Ohio-based start-up is making big gains in shoring up the problem.
Aeroseal, which seals both air ducts and building envelopes, is now available across America and in 29 countries.
Leaky airducts and walls are the single largest reason for wasted energy in homes.
Reducing that wasted energy not only lowers consumers' bills, but also reduces emissions associated with energy production, which are a significant contributor to climate change.
Aeroseal has so far raised about $30 million in venture capital from the likes of Breakthrough Energy, Energy Impact Partners, Building Ventures and 2150.