Summary of our unified interpretation for persistent EUV coronal outflows, radio noise storms, and sporadic weak type III radio emissions. It involves interchange magnetic reconnection at a high altitude coronal null point, continuously driven by slow active region expansion. The reconnection between dense active region loops (black) and diluted CH field lines (light grey) leads to the formation of new closed and open loops with a density gradient (black fading to grey), along which a rarefaction wave triggers low-altitude coronal flows, and along which low-energy electrons are accelerated from the null point, leading to radio emissions.