So, if we know that there is a causal link between human activity and CO2 emissions (which is blatantly obvious), and we know CO2 contributes to the greenhouse effect (which we can prove in labs via methods pointed out here: https://digitalcommons.conncoll.edu/cgi/viewcontent.cgi?article=1000&context=physicsfacpub ). Also please be aware that the linked article doesn't even go into methane.
Then surely it is appropriate to state "There is strong evidence linking human activity to climate change".
Then surely it is appropriate to state "There is strong evidence linking human activity to climate change".