Reuters: Plants help to slow climate change by emitting gases as temperatures rise that lead to the formation of a sunshade of clouds over the planet, scientists said on Sunday. The tiny sun-dimming effect could offset about one per cent of warming worldwide and up to 30 per cent locally such as over vast northern forests in Siberia, Canada or the Nordic nations, they wrote in the journal Nature Geoscience. While proportionally small, some scientists said the study provided further evidence of the importance...