Bless Donald Trump. At times like this, I think there is much good about this president. News comes that he considers himself "more knowledgeable" on climate change and that is opinion on the issue is "evolving."
It is common to be dogmatic. Once arriving at an opinion, most of us will not let it go. We hold loyalty to our own viewpoints rather than to the truth.
I do not know what was said at the G7 meeting. I understand Germany's Angela Merkel was among those who helped persuade Trump to reconsider climate change. Bless her, as well, as it takes great leadership skills to bring about such a change.