Which are the objectives?

The ONU has designed these objectives because of the actual world's climate situation. For example, 2010-2019 has been the warmest decade ever recorded. 

To sum up, this is the reason why we have to take action. And the objectives are:

Objectives:

13.1 Strengthen adaptation to climate hazards and natural disasters in all countries

13.2 Include measures against climate change in national policies, strategies and plans 

13.3 Improve education, awareness-raising and human and institutional capacity on climate change mitigation, adaptation, impact reduction and early warning

13.A Implement the commitment undertaken by developed-country parties to the United Nations Framework Convention on Climate Change to a goal of mobilizing jointly $100 billion annually by 2020 from all sources to address the needs of developing countries in the context of meaningful mitigation actions and transparency on implementation and fully operationalize the Green Climate Fund through its capitalization as soon as possible

13.B Promote mechanisms for raising capacity for effective climate change-related planning and management in least developed countries and small island developing States, including focusing on women, youth and local and marginalized communities

*Acknowledging that the United Nations Framework Convention on Climate Change is the primary international, intergovernmental forum for negotiating the global response to climate change.