1990年地球的表面温度是有记载以来最高的一年,这表明自80年代以来发现的全球变暖趋势仍在持续。世界上的两个研究地球表面温度的权威机构最近共同宣布了这一观察结果,但同时指出,他们还不清楚变暖趋势是否因大气中积聚的污染物所致。这一结果是由英国气 The surface temperature of the Earth in 1990 was the tallest year recorded, suggesting that the global warming trend that has been observed since the 1980s is continuing. The two authorities in the world who study the surface temperature of the earth jointly announced the result of this observation, but also pointed out that it is unclear whether the warming trend is due to the accumulation of pollutants in the atmosphere. This result is British