Geoengineering marks scientific gains in U.N. report on dire climate future

Geoengineering science is advancing, but the question remains - should we use it?

The U.N. climate report released Monday presents a major leap forward in predicting how geoengineering to limit global warming might affect the planet, although scientists said the greatest hurdle remains deciding whether to use the controversial methods. Geoengineering involves large-scale interventions that shift the climate, generally with an aim of cooling the earth.