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India and China spit faster than the rest of the world



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India and China spit faster than the rest of the world
Photo: NASA

China and India – two Asian power plants – are contributing significantly to the green of the planet, according to a new study released Monday.

The world now has about 5.5 million square kilometers of extra green leaves in the area around the year compared to 2000. Most of this growth is due to green in China and India. China contributed 25 percent to this increase, while India added 6.8 percent of the world's net growth in the region rose between 2000 and 2017.

The contribution to green by the two countries is much higher although they have less plant area than some of the developed countries. China has 6.6% and India accounts for only 2.7% of the world's flora. The increase in total area rose recorded in India is equal to that in the United States or Canada, each of which has three times more than the plant area.

Green refers to increasing the total leaf area – forests, croplands, plantations, plantations and monoculture, commercial plantations.

The increase in green areas is due mainly to the 35 percent increase in food production in both countries, with multiple cutting, with the help of fertilizers and the availability of water, as well as irrigation in groundwater. China has also taken on large-scale regeneration of forest and afforestation areas on degraded lands.

In China, green is from forests (42%) and croplands (32%), but in India, it is mainly from crustlands (82%) with a slight contribution of forests (4.4%).

Previous studies have identified the fertilization of carbon dioxide as the main reason for the decline of Earth's land. But this study found that green is more due to soil changes. The study is based on NASA MODIS sensor satellite data. These sensors see the earth twice a day at a resolution of 500 meters.

"China and India account for about a third of the green, but only 9 percent of the world's growing land surface," he said, "a surprising finding given the general perception that there is land degradation in populated countries due to overuse." Of the Department of Earth and Environment at Boston University, Principal Investigator, India Science Wire. The study was published in the journal Nature exists.

However, experts feel that the increase in green driven by croplands and orchards should not be seen as compensation for the loss of forests in Brazil, Indonesia and other parts of the world. "Green because intensive farming does not improve the land sink because the carbon crop is rapidly returning back into the atmosphere," explained Dr. Victor Brovkin of the Max Planck Institute of Meteorology, Germany, also co-author of the study.

"However, it is important that we find a green trend that includes natural vegetation (forests) in India, in contrast to some recent studies reported on the trend of browning," the city of D. " R. Rajiv Kumar Chaturvedi (BITS Pilani, Goa Campus), and a member of the research team, while talking about India Science Wires.

When asked how the new study compares the statistics in the forest area of ​​the Forest Forest of India (FSI), Dr. Chaturvedi said the two can not be compared as there are different contexts and goals. "I believe FSI estimates should be stronger because their estimates should be based On thousands of ground observations, in addition to satellite data. However, FSI estimates will gain greater credibility if their ground data as well as satellite assessment becomes accessible to the public and is subject to rigorous peer review, "he added.

The research team included Tsim Sha Tsui, Taigen Park, Baudong Xu Varange Minini (Boston University); Xuhui Wang, Shilong Piao, Zaichun Zhu (Peking University); Rajiv K. Chaturvedi (BITS, Goa Campus); Richard Fox (Institute for Meteorological and Climate Research, Germany); Victor Brobkin (Max Planck Institute for Meteorology, Germany); Paris Paris Saclay, France; Rasmus Fensholt (University of Copenhagen); Hans Tomerwick (Norwegian Institute for Natural History); Gova Bela Govindasamy (Indian Institute of Science, Bangalore); Ramakrishna R. Nemani (NASA Research Center).

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