Some scientists warn that ice near the Earth’s Poles may indeed be melting. This “polar meltdown” may be the first sign that the Earth is heating up. We could be in very serious trouble if this trend continue
根据第二段中的“the carbon balance of the Amazon rainforest is damaged largely due to large-scale (大规模的) human disturbance to the Amazon ecosystem(由于人类对亚马逊生态系统的大规模干扰,亚马孙雨林的碳平衡受到很大破坏)”可知,亚马孙雨林的碳失衡主要是由大规模人类活动造成的,故选C。【小题3】细节...
It is widely believed that humans exert a harmful impact on the natural environment, especially when it comes to releasing greenhouse gases into the atmosphere. And so there is some alarm that the amount of carbon dioxide (CO2) in the atmosphere has risen by 25-30 percent in the last 200 ...
At local levels, this effect can increase the temperature so that it is 25 percent higher than what the greenhouse effect would have done on its own. (CIS的科学家们公布了一项新的研究,该研究表明,二氧化碳含量的增加会导致植物保持水分,而这些水分原本会从它们的叶子蒸发进入大气层帮助地球降温。在地方...
CO2concentration. This has led to conclusions of the kind that a certain increasing part of anthropogenic emissions will remain in the atmosphere forever. The frequently used notion of “airborne fraction”, which is the part of anthropogenic emissions remaining in the atmosphere, seems to suggest ...
This paper examines the relationship among CO2 emissions, energy use, and GDP in Russia using annual data ranging from 1990 to 2020. We first conduct time-series analyses (stationarity, structural breaks, cointegration, and causality tests). Then, we per
根据第三段中的All of this extra carbon needs to go somewhere.So far,land plants and the ocean have taken up about 55 percent of it,(所有这些多余的碳都需要去某个地方。到目前为止,陆地植物和海洋已经占据了其中的55%)可知,陆地植物和海洋吸收了55%的多余的碳,由此可以推断出,超过一半的多余的碳被...
However, the mass burning of fossil fuels, and deforestation over the past two centuries has released trillions of tons of CO₂ into the atmosphere. This has caused atmospheric CO₂ levels to climb more than 50 percent above pre-industrial levels. Impacts of high atmospheric greenhouse gas ...
Forests used to cover large areas of the Appalachian Mountains in the eastern United States. In the state of West Virginia, coal mining let the land there bare, without trees. Over the years, coal mining and cutting forests took over 90 percent of the red spruce (云杉) forests. ...
With DAC, CO2is "vacuumed" directly from the atmosphere, so that the CO2concentration and greenhouse effect is reduced. However, the CO2concentration in the air is only around 0.04 percent. This is about 300 times lower than what comes from the exhaust gas in a coal-fired power station....