That small decline might not seem like a lot, but the fact that those numbers are going down after a long upwards climb is very good news. This decline occurred in areas across the world, including economic powerhouses of European Union nations, China, and the United States. The decline in China was particularly large, contributing heavily to that precious 0.6 percent decline overall. This isn't the first time in history that greenhouse emissions have fallen; the authors cite the breakup of the Soviet Union, the dot-com crisis, and the recent financial meltdown as points when emissions declined along with the global economy. But it is especially noteworthy because the decline happened during relatively robust economic times.