1. This link provides up-to-date news and information from the UN on climate change.

UNFCCC

2. The Intergovernmental Panel on Climate Change (IPCC) is the United Nations body for assessing the science related to climate change.

IPCC - Intergovernmental Panel on Climate Change

3. The BBC has presented some of the basic data used in climate change debate in seven charts some of which are animated aginst timelines (Climate change: Where we are in seven charts, 18 April 2019).

Climate change: Where we are in seven charts

The BBC News webpages track a range of international developments in climate change. The search string "bbc news climate change" picks up most of these.