Detailed Explanation:

Answer: Option 3 — The UNFCCC Secretariat

The "Momentum for Change: Climate Neutral Now" initiative was launched by the United Nations Framework Convention on Climate Change (UNFCCC) Secretariat in 2015 to encourage individuals, businesses, and governments to take voluntary action towards climate neutrality. In 2016, Climate Neutral Now became a new pillar under the broader "Momentum for Change" initiative, which highlights and promotes successful climate action worldwide.

📝 Short Notes: Climate Neutral Now Initiative

• Launch: Launched by UNFCCC Secretariat in 2015 to promote voluntary climate action towards climate neutrality
• Three-Step Process: (1) Measure climate footprint (greenhouse gas emissions), (2) Reduce emissions through sustainable practices and efficiency improvements, (3) Offset unavoidable emissions using UN-certified emission reductions (CERs)
• Momentum for Change: Climate Neutral Now was integrated as a pillar under the broader "Momentum for Change" initiative in 2016
• Target Audience: Individuals, companies, and governments worldwide
• Alignment: Supports Paris Agreement goals by fostering accountability and proactive engagement in climate action
• Recognition: Part of UNFCCC's efforts to showcase and scale up innovative climate solutions globally