Question: With reference to the principle of 'Common But Differentiated Responsibilities' (CBDR), consider the following statements:

I. This principle was formally adopted at the 1992 'Earth Summit' (Rio Earth Summit).

II. This principle acknowledges that developed countries have historically contributed more to global environmental pollution.

III. The objective of CBDR is to impose equal legal obligations on both developed and developing countries for cutting carbon emissions.

Which of the above statement(s) is/are correct?