China's EAST Shatters Fusion Density Limit, Accelerating Clean Energy Race

China's EAST tokamak has achieved stable plasma densities 1.3–1.65 times the Greenwald limit, validating a theorized density-free regime and challenging decades-old tokamak constraints.[1][2] This breakthrough enhances fusion power scaling—proportional to density squared—potentially compressing commercial timelines and reshaping global energy geopolitics amid 2.5% annual demand growth.[1][3]