How can they say that climate change will have dire effects on the whole world s ecosystems, when they failed to predict the spread of even a single species, the northern sea star, from Japan to Australia in ships ballast water?
(they; failed; to predict the spread of even a single species) (they; to predict; the spread of even a single species)
they they
failed to predict
to predict the spread of even a single species
the spread of even a single species