Flower power!

We’d finally fix climate change

No we don't. We want a bullet that penetrates armor without over penetrating the target, except for when the target is in behind a wall, or his friends are in the line of fire, that is also friendly fire/collateral damage proof, that flies perfectly straight in any conditions, cannot be scavenged by the enemy, can guide itself to targets, doesn't dirty the weapon, has no recoil, weighs nothing, and will never fail, jam, or misfire.