Well, duh! Everybody knows we have TWELVE years to go, not ONE year. I’m sure they are busy making new signs saying “Glaciers will be gone by 2030.”
Leave the old signs up. Just cross through 2020 and keep making revisions.
Could probably change that 2 to a 3 and save money.
Going to FOUR is going to be tough.
Trump should order those signs to be put back up - but with labels on them making it clear it was the Obama administration which was spewing this crap.