Scientific research shows that the need for resolute action to curb global warming from fossil fuel burning is become increasingly urgent. Yet policymakers in Japan and many other countries find it more difficult to take the necessary measures because they are costly and unpopular with many voters.

The climate change crisis is colliding with the economic crisis. Growth is slowing, particularly in Europe and the United States, while unemployment remains stubbornly high and government debt reaches unsustainable levels.

The new age of austerity demands that politicians cut costs. So they opt to continue using coal, oil and natural gas because it is cheaper and more reliable than most forms of low or zero-carbon energy.