The outcome of the COP 15 Copenhagen Summit was the recognition of the Copenhagen Accord as a non-binding agreement by the Conference of Parties (CoP). The Copenhagen Accord was the result of intense negotiations among the participating countries during the summit, which aimed to address climate change and reduce greenhouse gas emissions.

Explanation:
1. Copenhagen Accord:
- The Copenhagen Accord was a political agreement that was not legally binding.
- It was drafted by a small group of countries, including the United States, China, India, Brazil, and South Africa, and was later recognized by the CoP.
- The accord aimed to limit the global temperature rise to below 2 degrees Celsius and included commitments from both developed and developing countries to reduce their greenhouse gas emissions.
- It also proposed a goal of mobilizing $100 billion per year by 2020 to support developing countries in their efforts to address climate change.

2. Non-binding agreement:
- The recognition of the Copenhagen Accord as a non-binding agreement meant that countries were not legally obliged to fulfill their commitments under the accord.
- This was a significant departure from previous climate agreements like the Kyoto Protocol, which had legally binding targets for emissions reductions.

3. Controversial negotiations:
- The negotiations during the Copenhagen Summit were highly controversial and faced significant challenges.
- There were disagreements between developed and developing countries regarding the level of commitments, financial support, and technology transfer.
- The lack of consensus among countries resulted in a weak agreement that did not include specific emission reduction targets or a clear roadmap for implementation.

4. Lack of consensus:
- The Copenhagen Accord was not adopted as an official decision of the CoP but was recognized by the conference.
- While some countries supported the accord, others expressed reservations and concerns about the lack of inclusivity and transparency in the negotiation process.
- The recognition of the accord was seen as a compromise to salvage the summit and prevent a complete breakdown of negotiations.

In conclusion, the outcome of the COP 15 Copenhagen Summit was the recognition of the Copenhagen Accord as a non-binding agreement by the CoP. Although it was not legally binding, the accord represented a political commitment to address climate change and reduce greenhouse gas emissions. However, its adoption was controversial and faced criticism for its lack of specific targets and implementation mechanisms.