The global climate system is always changing and adjusting, always has, always will. Climates change. Climate is a major challenge, has been a major challenge, and will be a major challenge in the future. A UN committee was not necessary to inform everyone of that.
Climate scientists can certainly advocate as they please. But climate change advocacy such as here is simply misleading and implies that christianity should be against or at odds with the best available climate science. The political effort to get religious organizations on-board to support government funding on global warming or climate change is not new. When consulting business and/or research money are involved even climate scientists can lose their objectivity.