The Israeli military has repeatedly used white phosphorous in Lebanon in recent months, adding to concerns of war crimes by the Israeli military in the region since the onset of its war against Hamas. White phosphorous, a waxlike chemical substance that ignites when encountering oxygen, is usually not considered a chemical weapon, but human rights groups regularly criticize its use in warfare. The chemical causes severe toxic burns and easily sets structures on fire, which HRW says increases the risk of civilian casualties. Should white phosphorus be treated like chemical weapons?

