Donald Trump is a blow to Australia on climate and trade. Here’s how we minimise the damage | Ross Garnaut

During the US time out, Australia and its allies must remain steady and seek to deepen cooperation among themselves

The idea of open international exchange that framed the Australian reforms of the late 20th century and its subsequent economic success are being challenged in the 21st century. The challenge is intensified by the restoration of Donald Trump as president of the United States. He is committed to higher protection, tax cuts that will set record highs for budget deficits, a trade war with Australia's largest trading partner with a risk of worse, and separation of the United States from the rules-based international trading system. He is also committed to withdrawal from international cooperation and domestic action to reduce climate-changing emissions of greenhouse gases. Global financial crisis is not out of the question.

These developments will damage Australian interests. Global long-term interest rates set a base against which Australian rates settle, and will be higher than they would otherwise have been. International inflation will be higher, increasing Australia's own inflation challenge. Australia is the developed country that has most to lose from a failure to stop global heating. Australia has more to gain economically than any other country from success in the world achieving net zero carbon emissions, as an exporter of zero-carbon goods to countries which lack rich renewable energy and biomass resources of their own.