A net-zero world needs new markets and institutions

The EARTH’s great cycles are mostly driven by the sun. Sunlight evaporates water to create rain, thus powering the water cycle; it heats the tropics more than the poles, thus driving the ocean’s gyres; it is used by plants and algae to turn carbon dioxide into wood and frond, food and fibre, mulch and decay, spinning the biological carbon cycle. Plate tectonics is the great exception, driven instead by the heat of the inner Earth.