An examination of how extreme weather conditions threaten the people of Africa (Deutsche Welle). “The fact that we are getting a warmer planet and that’s impacting on the climate, we fully expect to have more extremes…..One reason Africa is particularly vulnerable to these changes is that an estimated 70 percent of the population grow their own food to some extent.” People who depend on subsistence agriculture have an uncertain future, complicated by the world’s fastest population growth.
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A high-ranking UN official offers a sobering account of how much hunger already exists in the world., drawing a clear link to the migration crisis. “Some 821 million people, or one of every nine people on the planet, suffered from hunger last year, marking the third consecutive annual increase, according to the UN’s latest hunger report.”
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A new report covers the decline of insect populations in a pair of tropical forests (Science magazine). Several species have almost vanished from a Puerto Rican rainforest that had been well protected, apparently for no reason other than climate change. The animals that eat them are also in trouble. A Mexican forest had a similar experience. Both forests experienced high temperature increases, 2C or above, over a four-decade study period.
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Humanity is ‘cutting down the tree of life” (The Guardian). “More than 300 different mammal species have been eradicated by human activities.” This article is about how much evolutionary diversity has already been lost. “The most important point is one that I believe is already widely recognised: humans are extinguishing not only many species, but many kinds of species.”
–A different review of the same study has additional details plus a graphic representation of the scale of losses.
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Humans began altering the climate thousands of years ago by the way they worked the land. Bill Ruddiman, a noted pioneer in this field of research, was co-author of an interesting new study. “It also shows that without this human influence, by the start of the Industrial Revolution, the planet would have likely been headed for another ice age…..The ancient roots of farming produced enough carbon dioxide and methane to influence the environment.”
Carl