Lorde has called on world leaders to take urgent action on tackling climate change, after a trip to Antarctica allowed her to view the crisis first-hand.The singer’s plea comes after she announced plans to release a new 100-page photo book which will document her trip to the continent last year.Lorde’s trip was funded by government agency Antarctica New Zealand and took place before she began writing new material for the follow-up to 2017’s ‘Melodrama’.In a new essay for New Zealand’s Metro