A detailed claim for climate change would be as follows:
Human-caused climate change is an urgent and existential threat to the planet and all its inhabitants.
What is the claim?
The claim is that climate change requires immediate and drastic action to mitigate its impacts and adapt to its unavoidable consequences.
A supporting evidence is that average global temperatures have risen by roughly 1 degree Celsius since the pre-industrial era, primarily due to greenhouse gas emissions from human activities like burning fossil fuels.