这个问题与答案从2015年从2014年。刚刚添加的观点以来一直做的一些研究。从本质上说,新的计算表明,nc(自然气候解决方案:结合土地管理、造林、等):>…可以提供>三分之一的成本效益的减缓气候变化需要从现在>,2030年来稳定气候变暖2°C以下。>来源:Griscom et al (2017), _Natural气候solutions_ PNAS, https://doi.org/10.1073/pnas.1710465114然而!树木,除了固碳,还排放挥发性有机化合物(VOC),作为温室气体。因此,答案并不像种树一样简单。引用了最近的一些文章主题:>许多科学家赞同推动扩大森林,但一些敦促谨慎。他们认为,森林有许多比政策制定者更复杂的和不确定的气候影响,环保主义者甚至一些科学家承认。虽然树木酷全球碳通过光合作用,还发出一种复杂的混合物的化学物质,其中一些地球变暖。 The dark leaves of trees can also raise temperatures by absorbing sunlight. Several analyses in the past few years suggest that these warming effects from forests could partially or fully offset their cooling ability. > Source: Gabriel Popkin (2019), _How much can forests fight climate change?_, Nature, http://doi.org/10.1038/d41586-019-00122-z and > That doesn’t mean that all forests cool the planet, however. Researchers have known for decades that tree leaves absorb more sunlight than do other types of land cover, such as fields or bare ground. Forests can reduce Earth’s surface albedo, meaning that the planet reflects less incoming sunlight back into space, leading to warming. This effect is especially pronounced at higher latitudes and in mountainous or dry regions, where slower-growing coniferous trees with dark leaves cover light-coloured ground or snow that would otherwise reflect sunlight. Most scientists agree, however, that tropical forests are clear climate coolers: trees there grow relatively fast and transpire massive amounts of water that forms clouds, two effects that help to cool the climate. > Source: Gabriel Popkin (2019) and > Atmospheric chemist Nadine Unger, then at Yale University in New Haven, Connecticut, conducted one of the first global studies examining one part of this exchange: the influence of volatile organic compounds, or VOCs, emitted by trees. These include isoprene, a small hydrocarbon that can warm the globe in several ways. It can react with nitrogen oxides in the air to form ozone — a potent climate-warming gas when it resides in the lower atmosphere. Isoprene can also lengthen the lifetime of atmospheric methane — another greenhouse gas. Yet isoprene can have a cooling influence, too, by helping to produce aerosol particles that block incoming sunlight. > Source: Gabriel Popkin (2019) and > Plants take up carbon dioxide and release volatile organic compounds > (VOCs), in a similar way to how other organisms breathe in oxygen and > exhale CO2. These VOCs are oxidized in the atmosphere and then > contribute substantially to the burden of tiny particles suspended in > the air, which are known as aerosols. Aerosols produced from VOCs are > known as secondary organic aerosols (SOAs), and affect both air > quality and Earth’s climate. The total rate of SOA production was > thought to be the sum of the individual rates associated with the > oxidation of each VOC. But writing in Nature, McFiggans et al.1 show > that a more accurate description is needed to improve the > representation of SOAs in computational models of air quality and > climate. > Fangqun Yu (2019), _Atmospheric reaction networks affecting climate are more complex than was thought_, Nature, https://doi.org/10.1038/d41586-019-00263-1 Sources of the articles: [one][1]; [two][2]; [three][3] [1]: https://doi.org/10.1073/pnas.1710465114 [2]: https://doi.org/10.1038/d41586-019-00122-z [3]: https://doi.org/10.1038/d41586-019-00263-1