Watch "Fresnel Lens Solar Foundry Obsidian Farm exceeding 3800 ˚ Fahrenheit 2100˚ Celsius" on YouTube
Update:
Heck, why not just embed the video?
Al Fin: "Cowboy Commentary", aka "Eat your veggies" The Flag banner is posted in order to defy those who would make patriotic symbols illegal or disreputable.
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