While Mr. Summers's thinking on climate change has evolved over the last decade, his views on the potential risks to the economy of an aggressive effort to limit carbon emissions have not.
In recent Republican debates, the "I'm not a scientist" talking point — implying that there is a scientific debate about the existence of climate change — has evolved into "One nation, acting alone, can make no difference at all," as Carly Fiorina put it recently.
Broome noted that his own approach to publicly discussing climate change has evolved.
The existential threat from climate change has evolved into this: At some point, saving our way of life will become impossible because it will become unaffordable.
Democrats lost seats in 2010 after passing a cap and trade bill — that basically levies a tax on companies for their carbon use — but the politics around climate change have evolved since then, especially on the Democratic side of the aisle.
"Do you want them to spend them in a way that benefits the public or not?" But Jess Worth of the campaign group Art Not Oil, which organised the letter, said signing up to a new deal would damage the reputation of the museum, especially since our understanding of climate change was evolving, with the need to "move away very, very fast" from fossil fuel companies.
If other bumblebees are likewise adjusting, "there's a prospect that bee populations that are facing climate change can evolve to some degree to not suffer the negative impacts".
The impacts, challenges and opportunities of climate change are evolving in the hearts and minds of citizens around the world, opening doors of opportunity for continued communication and engagement.
His views on climate change have also evolved.
At the international level, climate change policy has evolved from single issue to integrated approaches towards achieving sustainable development.
