Thousands of scientists, leaders, delegates and journalists from around the world have gathered in Glasgow for the next two weeks for COP26, the UN climate summit.
His discussions on climate change and reducing greenhouse gas emissions will take place behind closed doors at the SEC Center in Glasgow.
BBC science editor David Shukman went to take a look.
More about the climate summit:
The COP26 global climate summit in Glasgow in November is seen as crucial if climate change is to be controlled. Almost 200 countries are being asked about their plans to reduce emissions, which could lead to major changes in our daily lives.