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- Up to 5.5 billion people worldwide could be exposed to polluted water by 2100, a modelling study has found. Researchers mapped surface water quality under three different visions of future climate and socio-economic development. In every case, sub-Saharan Africa was shown to be among the worst-affected areas.
www.nature.com/articles/d41586-023-02337-7
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News about Water Pollution, including commentary and archival articles published in The New York Times.
2023年3月8日 · The world’s oceans are polluted by a “plastic smog” made up of an estimated 171 trillion plastic particles that if gathered would weigh around 2.3 million tons, according to a new study.
- Laura Paddison
- Overview
- Water forecast
Up to 5.5 billion people worldwide could be exposed to polluted water by 2100, a modelling study has found.
Researchers mapped surface water quality under three different visions of future climate and socio-economic development.
In every case, sub-Saharan Africa was shown to be among the worst-affected areas.
The predictions, published in Nature Water on 17 July1, offer “a temporal and spatial analysis of what has been, until now, anecdotal evidence regarding water quality in sub-Saharan Africa”, says Tafadzwa Mabhaudhi, who studies climate change and food security at the University of KwaZulu-Natal in Durban, South Africa.
Without adequate investment in water infrastructure or treatment, “we are definitely sitting on a time bomb”, adds Joshua Edokpayi, a researcher in water-quality management at the University of Venda in Thohoyandou, South Africa.
According to United Nations estimates, two billion people worldwide already struggle to access safe drinking water. In the past few decades, East Asia and the Pacific region have had the most surface water pollution, owing to booms in industrialization and population that have led to increasing demand for water in areas that do not have the infrastructure to support it.
To investigate the future effects of similar trends, researchers modelled water quality in 20-year chunks from 2005 to 2100, using existing models of global water quality.
They considered three future climate scenarios used by the Intergovernmental Panel on Climate Change, known as SSP1-RCP2.6, SSP5-RCP8.5 and SSP3-RCP7.0. SSP stands for ‘shared socio-economic pathways’, and considers various societal factors, whereas RCP describes ‘representative concentration pathways’, referring to trajectories of greenhouse-gas concentrations. For example, SSP5-RCP8.5 denotes a ‘business-as-usual’ trajectory defined by continued strong technological progress with limited concern for global warming. SSP1-RCP2.6 defines an optimistic ‘green’ future in which sustainability becomes globally prioritized.
2021年10月21日 · Plastic pollution in oceans and other bodies of water continues to grow sharply and could more than double by 2030, according to an assessment released on Thursday by the UN Environment...
2023年3月8日 · Getty Images. More than 171 trillion pieces of plastic are now estimated to be floating in the world's oceans, according to scientists. Plastic kills fish and sea animals and takes hundreds of...
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