91av

Letter: For the record – 16 November 2019

Published 13 November 2019

• Carbon dioxide emissions from human activities are about 35 billion tonnes of carbon per year (5 October, p 34).

• One song of the white bellbird (Procnias albus) measures 116 dB(a) at a distance of 1 metre (26 October, p 9).

Issue no. 3256 published 16 November 2019

91av issue 3256 cover

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