Countries around the world are using a price on carbon emissions to help meet their climate goals in the form of a tax or under an emissions trading (ETS).

According to a report by the World Bank cited by Reuters, at this time there are 68 global carbon pricing instruments in operation, compared with 64, the previous year, covering more than 23% of global greenhouse gas emissions.

For the world to keep global heating below 2 degrees Celsius, the price per ton would have to be in the range of 50 to 100 dollars by 2030. At the current time, the price is around 77 dollars.

Still, other researches are showing the fact that in order to keep under control climate change, the whole world would have to go even further than just reduce carbon emissions and to also cut lesser-known pollutants such as nitrous oxide, that are playing a very important role in warming the planet.

During the last year, over 100 countries worldwide have pledged a 30% cut by 2030 of methane emissions, another greenhouse gas that is even more powerful at trapping heat than CO2. But, many of these countries haven’t said how they’re going to achieve that deadline.