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https://envirowatchrangitikei.wordpress.com/2018/12/27/the-research-of-a-us-biophysicist-indicates-aerial-poisoning-has-twice-as-many-costs-to-native-species-as-benefits-is-twice-as-costly-to-native-species-as-unmanaged-possum-populations/
The research of a US biophysicist indicates aerial poisoning has "twice as many costs to native species as benefits" & is "twice as costly to native species as unmanaged possum populations"