A solicitation on the Department of Defense's Small Business Innovation Research web site is looking for a smart company to develop biodegradable ammunition. The military would like to see projectile cartridges—which are rarely all cleaned up after a live-fire exercise—made out of biodegradable plastic. The military also references a research paper on the use of biodegradable plastics reinforced with bamboo fibers. But the Pentagon isn't stopping there. It also wants spent ammunition and casings to contain bioengineered seeds that would, after several months, grow environmentally friendly plants that would remove soil contaminants. The proposal even specifies that animals "should be...