There are plenty of signs — amid the variability in conditions year to year, decade to decade, region to region — of the heating influence of greenhouse gases. (dotearth.blogs.nytimes.com)
«But because of the increasing influence of greenhouse gases, years like this may become commonplace over the next few decades.» (sciencedaily.com)
It turned out that a doubling of solar at the cost of 20 % influence of greenhouse gases did make an optimum... (realclimate.org)