根据第一段中的CO2 levels in the atmosphere grew at a record-high speed in 2013,and the planet's natural ability to take in carbon may be slowing down.That's what the World Meteorological Organization (WMO),a UN body,said in a recent report.(大气中的二氧化碳含量在2013年以创纪录的速度...
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 ...
While CO2 concentrations in the atmosphere have fluctuated throughout time, the rate of increase recorded since the 1850s is greater than any rate of increase that has occurred in the last million years2. As CO2 in the atmosphere rises, dissolution of CO2 into the ocean increases, thus ...
in the 18th century,atmospheric levels of CO2 have risen by nearly 40 percent,thanks mainly to uncontrolled burning of coal, gas and oil.Much of this CO, is absorbed by the ocean, causing it moreacidic.This process makes it harder for numerous marineorganisms to build the calcium-based ...
absorb on average 30 percent of anthropogenic CO2 emissions, thereby tempering the increase of CO2 concentration in the atmosphere. But plants need water to grow. When a drought occurs and soils dry out, plants reduce photosynthesis and breathe less in order to save water and preserve their ...
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...
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....
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 ...
Fungi that form symbiotic relationships with plants are called mycorrhizal fungi. Over 90 percent of all plant life on Earth associates with mycorrhizal fungi, which provide plants with soilnutrients10in exchange for plantcarbohydrates11. "While researchers have long known that mycorrhizal fungi play an...
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...