In the
article and subsequent aimiable exchange with Nordhaus, Dyson
touted no fewer than three possible crackpot mega-schemes as contingency «low - cost backstops» against global
warming: «carbon - eating trees» covering fully a quarter of Earth's vegetated land mass, «carbon - eating phytoplankton in the oceans», and «snow - dumping in East Antarctica» (via «a giant array of tethered kites or balloons so as to block the westerly flow on one side only.»)