The main principle behind the Paris agreement is that every country in the world should lower their CO2 emissions by an amount sufficient to keep the temperature rise within 1,5-2 degrees C.

The question is: is it reasonable and fair to tell every country to lower the emissions by the same percentage every year?

OR: Would it be more appropriate and fair to tell countries with the biggest emissions and the best economy, to do significantly more than countries with a weak economy, and a per capita emission, that is measured in 100’s of kilograms, not tons.

Read more here.