Während der Covid-Pandemie 2020 sind laut einer Studie die Seen weltweit klarer geworden, auch in der Schweiz.
Positive effect of Covid - Corona lockdowns led to clearer lakes worldwide
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Sat 07:25 - SRF Wirtschaft
After the corona pandemic – vaccines: from cash cow to loss-making business
Sat 16:46 - SRF Wirtschaft
Positive effect of Covid – The pandemic improved lake clarity in 2020
Sat 16:46 - SRF Wirtschaft
Positive effect of Covid - Corona lockdowns led to clearer lakes worldwide