To determine the concern of the REDD Plus Programme, let's explore the given options:
- Nuclear Non-Proliferation Treaty (NPT): Focuses on the prevention of the spread of nuclear weapons and technology, unrelated to REDD Plus.
- Convention on Biological Diversity (CBD): Aims to conserve biological diversity, promote sustainable use, and share benefits from resources, aligning with REDD Plus goals.
- Millennium Development Goals (MDG): Comprised broad global development targets, not directly related to REDD Plus.
- Earth Summit: The 1992 conference addressing sustainable development, related but not specific to REDD Plus.
The REDD Plus Programme is indeed concerned with the Convention on Biological Diversity (CBD) as it focuses on reducing emissions from deforestation and forest degradation, directly aligning with biodiversity conservation efforts.