

Solar panels combined with House batteries or Vehicle to grid is cheaper and more reliable than a backup generator, and in many cases, is even cheaper than using energy from the grid.
The majority of materials in each battery and solar panel can be recycled into new batteries and solar panels at end of life (often after 25+ years), so the raw resources are only needed once.
Most new batteries don’t use rare or controversial materials.















EGPWS - stops airliners accidentally flying into mountains.
Home Assistant - full control over your smart devices, internet optional.
Sierra Leone hospital - their first hospital that has a neonatal unit, already drastically reducing the maternal mortality rate.
PMSM - electric motor that can exceed 95% efficiency.
Proton - allows almost any game to run on Linux.
3D printing - much cheaper rapid prototyping and custom parts. Even used on the ISS.