Solar Oven

Solar Oven

Secretive energy startup backed by Bill Gates achieves solar breakthrough-CNN: https://edition.cnn.com/2019/11/19/business/heliogen-solar-energy-bill-gates/index.html

Before that: 

This climate problem is bigger than cars and much harder to solve – Vox: https://www.vox.com/energy-and-environment/2019/10/10/20904213/climate-change-steel-cement-industrial-heat-hydrogen-ccs