«Every day in cities, there are going to be choices made that affect plans on the scale of decades to centuries,» she said. (scientificamerican.com)
CO2's effects last for decades to centuries — it's a trend that's pretty easy to spot. (realclimate.org)
Moving them all back to purpose made passive solar houses in little idyllic clusters, with farms around, is going to take come convincing people, and would take decades to centuries. (realclimate.org)