That depends on whom you ask. EU benchmark prices are a little more than €8 a tonne. But many industries suspect that this will not last much longer.
The expectation that governments will strike a global accord limiting CO2 pollution at a UN summit in Paris this December has moved them to use much higher rates as planning tools for instance to evaluate the expected pay-back of planned pollution abatement measures. Several oil and gas companies have used internal carbon prices ranging from $40 to $80 a tonne to help assess the value of investments.
Source: CDP and Financial Times
