Dryad provides ultra-early detection of wildfires as well as health & growth-monitoring of forests using solar-powered gas sensors in a large-scale IoT sensor network. Dryad aims to reduce unwanted wildfires, which are causing up to 20% of global CO2 emissions and have a devastating impact on biodiversity. By 2030, we aim to prevent 1m hectare of forest from burning, preventing 400m tons of CO2 emissions.