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Humans may need to “wait for decades” to see the results of large emission cuts on global surface temperatures, scientists have said. Researchers in Norway used computer simulations to analyse various scenarios that looked at the effects of rapid reductions in several types of greenhouse gas emissions, such as carbon dioxide (CO2) and methane.
They found that although large-scale emission cuts are needed to achieve the global climate goals, it may take decades before the effects of the reductions on temperatures can be measured.
The researchers estimated that even for the most optimistic scenarios, it will take at least 15 years to establish the impact of emission cuts on climate change.
Bjorn H Samset, of the Centre for International Climate and Environmental Research (Cicero) in Oslo, said: “Humaninduced climate change can be compared with a tank ship at high speed and in big waves. If you want the ship to slow down, you will put the engine in reverse, but it will take some time before you start noticing that the ship is moving more slowly. It will also rock back and forth because of the waves.
(www.sciencefocus.com. Adaptado.)
No trecho do último parágrafo “but it will take some time before you start noticing”, o termo sublinhado estabelece, entre a oração que ele introduz e a que o antecede, uma relação de