The first full day of the year's most important summit on climate change, known as COP27, got underway on Monday with urgent calls by leaders to slash greenhouse gas emissions as the planet warms and severe weather events become more frequent and destructive.
Scores of presidents, along with thousands of diplomats, climate negotiators, business leaders, activists and journalists descended on the Red Sea resort city of Sharm El-Sheikh to take part in discussions and negotiations slated to go through Nov. 18.
