Cambridge scientist Peter Wadhams who's been measuring and monitoring the Arctic since 1971, says the decline is irreversible.

2016年6月六级真题（第一套）听力 Section C

Wadhams echoes the need for urgency.

2016年6月六级真题（第一套）听力 Section C

Wadhams says there is no easy technological fix to climate change.

2016年6月六级真题（第一套）听力 Section C