- Biden just declared heat pumps and solar panels essential to national defense – here's why and the challenges ahead. The DOD has identified numerous national security risks arising from climate change. Russia’s invasion of Ukraine highlights additional risks of relying on fossil fuels. https://theconversation.com/biden-just-declared-heat-pumps-and-solar-panels-essential-to-national-defense-heres-why-and-the-challenges-ahead-184632 103 comments energy