日本无限资源_福禄影院午夜伦_美国av毛片_亚洲自拍在线观看_激情亚洲一区国产精品_999久久久久

China, India contribute most to global greenery expansion: NASA data

Source: Xinhua| 2019-02-13 02:49:05|Editor: yan
Video PlayerClose

WASHINGTON, Feb. 12 (Xinhua) -- Data from NASA satellites have shown that China and India led the way in greening on land, thanks to ambitious tree-planting programs in China and intensive agriculture in both countries.

The study published in the latest edition in Nature Sustainability on Monday showed that at least 25 percent of the foliage expansion since the early 2000s globally came in China.

The researchers from Boston University found that global green leaf area has increased by 5 percent in the new century, an area equivalent to all of the Amazon rainforest.

"China and India account for one-third of the greening, but contain only nine percent of the planet's land area covered in vegetation," said lead author Chen Chi of Boston University.

"That is a surprising finding, considering the general notion of land degradation in populous countries from over-exploitation," said Chen.

Rama Nemani, a research scientist at NASA's Ames Research Center and a co-author of the study said: "When the greening of the Earth was first observed, we thought it was due to a warmer, wetter climate and fertilization from the added carbon dioxide in the atmosphere."

But with data from NASA's Terra and Aqua satellites, scientists realized that humans are also contributing.

"Humans are incredibly resilient. That's what we see in the satellite data," said Nemani.

China's contribution to the global greening trend comes in large part from its programs to conserve and expand forests, accounting for about 42 percent of the greening contribution, according to the study.

Another 32 percent of the greening change in China, and 82 percent in India, resulted from intensive cultivation of food crops, since the farmland in China and India has not changed much since the early 2000s, while both increased their food production to feed large populations.

However, the researchers rang bells as well. They said that the gain in global greenness did not necessarily offset the loss of natural vegetation in tropical regions like Brazil and Indonesia.

The loss of sustainability and biodiversity in those ecosystems cannot be offset by the simple greenness of the landscape, according to the study.

TOP STORIES
EDITOR’S CHOICE
MOST VIEWED
EXPLORE XINHUANET
010020070750000000000000011105521378164951
主站蜘蛛池模板: 久草视频手机在线观看 | 国产性一乱一性一伧一色 | gg55gg国产成人影院 | 久久精品视频免费看 | 久久棈精品久久久久久噜噜 | 国产最新一区二区 | 国产免费一区二区三区在线网站 | 国产一区二区三区不卡在线 | 国产一区视频在线免费观看 | 中文字幕免费播放视频 | 在线成人免费网站 | 最新zooskoovideos欧美异 | 久久双人床双人片 | 久热中文在线 | 九九热在线视频免费观看 | 免费观看色视频 | 欧洲亚洲国产一区二区 | 国产成人午夜片在线观看 | 亚洲一二三四影院 | 在线亚洲播放 | 亚洲成人三级在线观看 | 国产免国产免‘费 | 放个毛片看看 | 亚洲天堂成人网 | 久无码久无码AV无码 | 午夜在线一区二区 | 日韩一区二区国产 | 欧美日韩在线一区二区三区 | 国产成人精品高清在线 | 久久久噜噜噜久久熟女AA片 | 久一区二区三区 | 国产甜淫av片免费观看 | 在线播放免费人成视频在线观看 | 女人找男人皮日日视频 | 欧美精品v国产精品v日韩精品 | 免费一级婬片AAA毛片肥肥女 | 狠狠躁夜夜躁人人爽超碰97香蕉 | 粉嫩蜜臀av国产精品网站 | 日韩一级黄色片 | 亚洲精品无人一区二区 | 日韩精品成人网 |