In preparation for the forthcoming COP26, to be held at Glasgow in November 2021, the Environmental Committee of the Accademia Nazionale dei Lincei has decided to contribute to an assessment of the current issues in climate research, convening an International Conference in Rome on 9-10 September 2021. The meeting has gathered some of the most prominent scientists, economists and engineers, featuring the basic science of climate change and its impact on the natural and built environments.

The report is meant to summarize the outcome of the meeting for the benefit of participants in COP26. The Report is conceived as a sequence of outstanding questions, each addressed by one of the speakers in there talks. The brief responses provided by the speakers reflect therir scientific convictions, concerns and possibly also taste. The conclusions of the Report include five important statements that have been agreed upon by all the speakers and form the final message addressed to policy makers and citizens and delivered to COP26.