Speeding up the half-life of plutonium using neutrons is theoretically possible, but the practical application involves using a nuclear reactor to consume plutonium-239, rendering it unusable for weapons. The discussion highlights that while plutonium is manmade and primarily produced from uranium, simply ceasing its production is the most effective way to prevent its use in nuclear arms. There are significant civilian stockpiles of plutonium, estimated at 371 metric tons, which could potentially be converted into nuclear weapons. Induced fission does not equate to radioactive decay, and accelerating alpha decay is considered virtually impossible. Overall, the focus remains on managing plutonium through reactor use and production cessation to mitigate nuclear weapon proliferation.