Radiant Nuclear is developing a small modular reactor to replace diesel generators. The startup previously raised $165 million in May.

The food waste startup founded by Nest alumnus Matt Rogers also received an investment from Amazon's Climate Pledge Fund.

Last Energy will use the funds to build its 5 megawatt pilot reactor in Texas, which it hopes to turn on next year.

Everbloom has also developed a chemical process to transform waste fibers and feathers into upcycled materials that resemble everything from polyester to cashmere.