The Army has been researching a more environment-friendly bullet at the Picatinny Arsenal, in New Jersey, since 2010. A lead-free version of the 7.62-mm rounds fired from M-14 rifles will be issued to troops in 2014. That will follow a prior switch to a greener 5.56 mm "Enhanced Performance Round" the Army switched to in 2010.
“The EPR replaces the lead slug with a copper slug,” Lt. Col. Phil Clark, product manager for small-caliber ammunition at Picatinny, told the Daily Caller. “This makes the projectile environmentally friendly, while still giving soldiers the performance capabilities they need on the battlefield.”
Last I checked, waging war also included the use of things like grenades. Claymores. Hellfire missiles. TOWs. Tanks. Bunker-buster bombs. Tomahawks. Drones. Napalm B. Naval gunfire support.
None of which are really known for being "environmentally friendly".
By the patron saint's name of Frick... do these idiots not understand what the word "battlefield" means?