The fourth theme (with two topic groups) discusses the major threats and challenges related to climate change, its predictions and appropriate responses and the introduction of renewable energy.
This theme relates to SDG 7 and 13.

4a Predictions and Responses (SDG 13)
4b Affordable and Clean Energy (SDG 7)

Updates for the ISDRS 2020 Budapest Conference can be found in their respective topic group pages displayed above