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The research team, led by Niels Andela of NASAs Goddard Space Flight Center, analysed fire data derived from the Moderate Resolution Imaging Spectrometer instruments on NASAs Terra and Aqua satellites.Across Africa, fires collectively burned an area about half the size of the continental US every year.NASA satellites have detected a drop in forest fires and burn scars worldwide, indicating a transition from nomadic cultures to settled lifestyles and intensifying agriculture, scientists say. Regions of China, India, Brazil, and southern Africa also showed increases in burned area.A slightly different pattern occurs in tropical forests and other humid regions near the equator.The impact of a warming and drying climate is more obvious at higher latitudes, where fire has increased in Canada and the American West.Across the grasslands of Asia, the tropical forests of South America, and the savannas of Africa, shifting livelihoods are leading to a significant decline in burned area. In traditional savanna cultures, people often set fires to keep grazing lands productive and free of shrubs and trees. They then compared these data sets with regional and global trends in agriculture and socio-economic development.

The changes in savanna, grassland, and tropical forest fire patterns are so large that they have so far offset some of China Wholesale Semi Rigid Hoses the increased risk of fire caused by global warming, said Doug Morton, a forest scientist at NASA Goddard.By 2015, savanna fires in Africa had declined by 700,000 square kilometers. However, as many of these communities have shifted to cultivating permanent fields and building more houses, roads, and villages, the use of fire has declined.Fewer and smaller fires on the savanna mean that there are more trees and shrubs instead of open grasslands. Regions with less fire saw a decrease in carbon monoxide emissions and an improvement in air quality during fire season. Globally, the total acreage burned by fires declined 24 per cent between 1998 and 2015, according to the study published in the journal Science.As more people move into these areas and increase the investments in agriculture, they set fewer fires and the burned area declines again. Fire rarely occurs naturally in these forests; but as humans settle an area, they often use fire to clear land for cropland and pastures. This is a significant change in habitat for the region's iconic mammals like elephants, rhinoceroses, and lions.There are benefits to fewer fires as well..Scientists determined that the decline in burned area was greatest in savannas and grasslands, where fires are essential for maintaining # healthy ecosystems and habitat conservation."Humans are interrupting the ancient, natural cycle of burning and regrowth in these areas," said Jim Randerson of the University of California, Irvine in the US."Fire had been instrumental for millennia in maintaining healthy savannas, keeping shrubs and trees at bay and eliminating dead vegetation," said Randerson.