Exactly, you don't need to twist the facts to maintain the degree of urgency. Just needs the right framing.

"This glacier likely won't survive long enough for your kids/grandkids to see themselves"

Well if we're going to still claim it's science, there needs to be a measurable range stated.

Being over ambiguous just to be right can be just as misleading as overstating certainty. (Think Nostradamus type claims.)