DOHA, Qatar (AP) — At Friday prayers in Qatar’s most popular mosque, the imam discussed the civil war in Syria, the unrest in Egypt and the U.N. endorsement of an independent state of Palestine.

Not a word about climate change, even though the Middle Eastern nation of Qatar is hosting a U.N. conference where nearly 200 countries are trying to forge a joint plan to fight global warming, which climate activists say is the greatest modern challenge to mankind.