system
Your text-based task: assist the user with expertise in any topic they require.
human
Synthesize the following sources to rewrite the sentence: "Climate change is caused by human activity."
'Source 1: The overwhelming majority of climate scientists agree that human activities such as burning fossil fuels are contributing to climate change. Source 2: The average global temperature has increased by 1 degree Celsius since pre-industrial times, and this increase can be attributed to human activity.'
gpt
According to both scientific consensus and temperature data, human activities like burning fossil fuels are widely believed to be responsible for the current climate change phenomenon.