Those of us who study climate change know what’s needed is a safe, zero carbon energy source that is both cheaper than fossil fuels and able to supply electricity at all times, not just when the sun is shining or wind blowing.

Mainstream economists have for years said the best way to decarbonise economies is through a carbon tax. This is the proposal of Citizens Climate Lobby, a US based global movement to enact revenue neutral, rising carbon taxes in national economies the world over. But has it been tried in practice? Well the UK has a ‘carbon…