Over a thousand pages of analysis, imagining what life might look like at the end of the century as climate risks intensify, has finally dropped.

The federal government's eagerly anticipated National Climate Risk Assessment (NCRA) is a hefty tome. It details the risks climate change will pose to Australia — from national security to food production, health systems and everything in between.

The assessment was supposed to be released last year, but was delayed as speculation mounted as to just how bad the outlook might be.

It's involved hundreds of climate scientists, as well as policy makers and experts who modelled three different warming scenarios out to the end of the century.

"Climate science and modelling show that extreme weather is expected to behave differently compared with

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