Once we start deliberately messing with the climate systems, we could inadvertently shift rainfall patterns (climate models have shown that rainfall in the Amazon might be particularly vulnerable), causing collapse of ecosystems, drought, famine, and more.
With so much at risk, you might expect Australia to be at the forefront of the clean-energy revolution and the international effort to cut carbon pollution. After all, the continent's vast, empty deserts were practically designed for solar-power installations.