Prof Dr Ottmar Edenhofer (Potsdam Institute for Climate Impact Research) says it all in one sentence:

"It doesn't cost the earth to save the planet"

Two things are crucial for limiting global warming:

1. Central goal:

Keeping to a Paris-compatible
remaining CO2 budget

CO2 emissions accumulate in the atmosphere. Therefore, the sum of the emissions that we still cause is crucial in order to comply with certain global warming limits.

Notes on the CO2 clock

An ambition mechanism was agreed in the Paris Agreement, in which countries are to deliver increasingly ambitious nationally determined contributions (NDCs).

We now urgently need a global discourse on what is a fair share of the globally necessary efforts, especially of the major emitters (China, USA, EU, India, Russia and Japan), which are responsible for around 70% of CO2 emissions. The pressure on all parties to the Paris Agreement to submit Paris-compatible NDCs must be massively increased.

We say that when setting an NDC derived from a global remaining carbon budget, at least the two most important factors "current reality" and "climate justice" should be taken into account. This can be implemented through a weighted allocation key that includes a country's share of current global emissions and global population.

Here is a web application to implement this approach:

Here is an overview of our tools and papers on Paris-compatible emissions targets:

See the tabs "publications", "downloads" and "ESPM" for publications, tools and exemplary results.

2. Central tool:

Effective CO2 price & full climate dividend

CO2 emissions must be given an effective price. "Effective" means that the CO2 price is high enough for the reduction targets to be met - however high they have to be (whatever-it-takes-CO2-prices).

The entire revenue from the pricing of CO2 should be returned to the citizens in the same amount per capita. Such a climate dividend creates broad acceptance for an ambitious climate policy and very effective social equalisation.

The broadest possible social agreement is needed to accept the CO2 price required for successful decarbonisation. If a society can agree on such effective CO2 prices, this will also create the all-important planning security for private and public investments in a fossil-free future.

Here a brief description of how an effective CO2 price with a full climate dividend works.

Let's all take responsibility now and pull the decisive lever for a good decarbonisation process through effective CO2 prices.

Paradigm shift in climate policy =
effective CO2 prices +
full climate dividend =
effective climate protection +
full solidarity

The best instrument to ensure compliance with remaining CO2 budgets are emissions trading systems (ETS) with binding emission caps (hard caps). Such emissions trading generates the CO2 price that is necessary to comply with the CO2 budget. However, the resulting "whaterver-it-takes-CO2-prices" are only politically conceivable and socially justifiable with a full climate dividend.


climate protection is human protection