SEA LEVEL: Sea level changes for various reasons and in various ways. Part of the sea level question is something that has been discussed before in this thread.
There are some small things to clear up here before they turn into points of confusing arguments.
There are two types of sea level rise (or drop). One of these is global sea level. The ships out of the water and the pumping water out for desalinization, or longer term changes in ocean basin size affect global sea level. Expansion of water due to slight warming of the oceans also plays a role, so climate change is part of it now and melting of ice on land or sliding of glaciers into the oceans is probably the biggest one for the next few hundred years. Another type of sea level rise is regional and happens because the land goes up or down. Part of the effect in New York is regional. The ice caps that used to be in Canada pushed the area around Hudson's bay down and that caused the area around New York to rise up like a see saw would. That motion reversed when the ice caps melted and some of our favorite east coast cities are sinking.
Venice is an example of the regional type. The prediction from climate change would be sea level will rise of the global type. Taking data from a reputable source (I know some will argue their sources are better, but I leave that to you) we see a rise. I know people have said, well it is just 0.2 (or 0.4) meters what does that mean. That could be a point and would dictate how we respond. Even this amount appears important for some ecosystems (like ghost forests and coastal flooding and salinization).
TEMPERATURE: It also appears that there has been warming as shown in global datasets maintained by NASA.
But these also differ from smaller datasets like the one shown other posts. The predictions also differ, but it depends how those predictions were made. There is a wiggly one with no vertical axis label, which is what is referred to as a schema or cartoon and is the maker's personal interpretation. There are also model predictions like those from the IPCC that are based on fundamental physics and chemistry and dynamics.
PREDICTIONS: The claim has been made that no prediction has ever survived the test of time. I think we only need to look at the data that exists and at the predictions that have been made to see that the general model predictions have been remarkably good. Sure they can be improved, but compare observed temperatures versus predicted model temperatures and judge for yourselves.
WHAT CAN BE DONE: We might also look at the successes we have had. Ozone has come up in the recent discussions. That was dealt with by international agreement and the actions of that agreement have made a difference. Ozone may still be recovering, but its original trajectory has been stemmed. The issue of acid rain is another where human intervention has made a huge difference. It was recognized in the 1970's and 1980's that acidification of rain due to oxidation of sulfur dioxide to sulfur trioxide, which reacts with water to form sulfuric acid, was causing big problems with watersheds in the northeast US. That was largely addressed by scrubbers on coal plants and to some extent smelters around the Great Lakes. You might say this is not climate and I would agree, but it was on the cartoon posted earlier that considered it a failed climate prediction. Land management is another. We had the dustbowl and the famines, which was in part land management. Another that is interesting to consider is the prediction that extreme weather events could have an increasing impact on us. This was made back in the 1990s and was something that was worried enough about that politicians started arguing against using the term 'rapid climate change'. Whatever you want to call them, things like drought, earlier spring, floods, hurricanes, tornadoes, water resources, soil resources, extreme warmth in Europe and the West, etc.... are tied to climate. The changes in these can be viewed as abnormal (extreme) or they can be viewed as changes in the climate zones we live in. If we build for one zone and it shifts to become another, it can have an impact. That might be what we are seeing in the south. Their climate zone is shifting as though they were located a little more southerly.
LOOKING FORWARD: The argument that change is occurring is extremely strong and continues to grow stronger. The case that humans have had an impact also is very strong and continues to grow stronger. There will always be alarmists and it looks like there will always be deniers. The thing we want to do as the middle/majority that thinks about these things in a reasonable way, is to look at the evidence, (good evidence, evidence that has been reviewed and validated in rigorous ways) and seek to understand what is happening. I would be very happy if the current trends reversed as shown by some of the extremist climate change deniers I see here. And my views would be changed by a sustained reversal that fits one of the alternate views. Do I think those reversals will happen? No. But I wish they would. Unfortunately, the burden of evidence points to change and shows again and again that it has occurred and is on a trajectory that can be explained by fundamental principles that control the way climate evolves. Let's hope the deniers are right for once, but let's keep an open mind and look at the evidence and then deal with it in a responsible way. Climate is part of it, but water and soil are also critical because they represent food.
I asked myself I wonder if the military takes a stand on this. It looks like the Army presently does
https://www.army.mil/standto/archive/2021/05/14/ It looks like the Navy was doing this, but cancelled it in 2020. As much as I wish it were not the case, I think we will find it increasingly something that we have to pay attention to and adjust to.