information will remain useful, perhaps for verification, since the world is not run by a one world government. the majority of the world agrees on the problem and the scale of the problem, but we still disagree on how to verifiably account for each others excesses and hopefully someday large scale sequestration. dissolving carbon in the sea will be hard to verify, and hence hard to agree on. if we say store carbonates (say hermetically wrapped in plastic and uniquely numbered and mapped in a database) in abandoned mines etc, then at least it can be inspected by international visits: the host lists the number of packs, their average carbon content etc, and science delegates from around the world can choose random numbers, go the the designated spot on the map, locate the pack, verify the number, weigh it, each take a sample of the carbonates, independently measure and compare the measured weights and concentrations with the documented ones. This for multiple packs to be statistically significant.
Anyone (like even citizens like you and me) who is sceptic about bribery is free to submit salted hashes (commitments), say a hundred (or whatever the count of packs that will be inspected)
whenever a new pack is to be chosen randomly, everyone reveals their secret number and salt, the numbers are all added modulo total number of claimed packs in the store. If your revelation of your secret systematically fails to reach the inspectors before a deadline, it is probably rigged. You can safely discount wild claims of rigging by participating and observing your number be systematically be included.
As long as multiple nations in an adversarial world distrust each other of trying to get special treatment, action will be postponed till the last minute...
Information is action. For example you might know that smoking is bad for you but you may not have the tools to quit. So more information from experienced people might help.
