UN Chief Speaks From Antarctica Ahead of Global Climate Summit 

U.N. Secretary-General Antonio Guterres is pictured on Antarctica, Nov. 24, 2023. (Chilean Presidency/Reuters)

On the eve of international climate talks, U.N. Secretary-General Antonio Guterres visited globally important Antarctica, where ice that's been frozen for millions of years is melting because of human-caused climate change, to send the message that "we absolutely need to act immediately."