Fertiliser

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Toilets aren’t just a bin for human waste – they’re a receptacle for future fertiliser. Gates Foundation

The other benefit of sanitation: from human waste to human food

By Andrew Hamilton, University of Melbourne

What goes down our toilet is commonly viewed as waste. This makes intuitive sense because separating people from their excreta – sanitation – is arguably the single most important public health objective…
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Overuse of nitrogen fertiliser can have nasty environmental consequences. eutrophication&hypoxia/Flickr

Agriculture’s hunger for nitrogen oversteps planetary boundaries

By Trevor Garnett, Australian Centre for Plant Functional Genomics and Arwen Cross, CSIRO

Planet Earth has boundaries for its biophysical subsystems. By 2009, we had already exceeded three of the boundaries – climate change, biodiversity loss, and the nitrogen cycle. Climate change is a top…
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Another wave is coming: the coral-killing crown of thorns starfish. Flickr/<SLIM>

Great Barrier Reef dying beneath its crown of thorns

By Jon Brodie, James Cook University

The Great Barrier Reef is under attack from a range of enemies including climate change effects (coral bleaching, increased severe storms, and ocean acidification), pollutant discharge from the land, coastal…

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