Axel de Tarlé, Wednesday on Europe 1, returned to the statements of the European number 1 in steel: the boss of Arcelor Mittal.

Producing "clean" steel, without CO2 emissions, it's possible! However, it is much more expensive, warns the European steel giant Arcelor Mittal. We saw it with the elections of Last Sunday, everyone aspires to live in a carbon-free world. But beware, to get there it is not a pink path.

Daniel Cohn Bendit also explained, on Europe 1 Tuesday, that ecology, "it can hurt, it can sting". For example, he said: "Limit the speed to 110 km / hour, when the highway is empty, you don't do it with a cheerful heart".

In the same line, there were the declarations of the boss of Arcelor Mittal, the number 1 European of steel. Making steel is a very polluting activity because coal and iron are mixed at very high temperatures. The sector alone accounts for 7% of global CO2 emissions.

The boss of Arcelor explains very calmly that making clean steel, without emitting C02, it is possible, the technologies exist. There are three: replace coal with other raw materials, recycle with electric ovens and capture the CO2 that escapes from blast furnaces.

The boss of Arcelor is playing card on the table. These technologies exist but they have a cost: between 15 and 40 billion euros. It is time to change the model, said Emmanuel Macron before the Citizens' Convention. Provided that the rules of the game are changed.

First of all, it means banning, or heavily taxing, steel from China, which does not respect the same rules. Otherwise, it is bankruptcy for Arcelor. And then, second question: this additional cost of 15 to 40 billion. Who will pay for it? The consumer ? The state with subsidies, that is to say with our taxes.

These are, in a very concrete way, the questions that arise with the ecological transition in all sectors. As Daniel Cohn Bendit says. Ecology can also sting.