I caught the latest update TheMann! Very tasty stuff.
Being a techie, seeing fusion take off, as well as OTEC and meaningful clathrate exploitation, plus SPS, geothermal, and other sources developed and exploited means energy crises are done. Sweet!
Energy crises are already becoming largely a thing of the past. Develop of alternative fuels and considerably-better American can fuel efficiency (not Europe, but considerably better than OTL) have already reduced fuel consumption. The percentage of power generated by coal in the United States declined steadily from 40% in 1970 to 16% by 2010 to the last such plant closed down forever in 2033, so its emissions are mostly history, but coal now has a much bigger new market, that being making synthetic petroleum out of it.
For heating homes, natural gas costs more here and is sufficiently expensive that electrical heating of homes is fairly common, but calthrate exploitation, while admittedly somewhat dangerous, has the ability to end the problems of energy shortages. Modern filters and the wish to collect the carbon dioxide mean that most of the best modern such plants produce little emissions at all.
Renewables' share of electricity production is up in large part due to a number of factors. Ontario ITTL did what Quebec did and built a huge network of hydroelectric dams, allowing Ontario Hydro to make huge profits exporting power to Michigan, New York, Ohio, Pennsylvania, Indiana and Minnesota, thus reducing pollution from coal-fired stations there. On top of that, many new and rebuilt dams on major rivers produce hydroelectric power and pumped-storage schemes have been built in a number of places in the West, taking advantage of growing rainfall there. OTEC is only really viable in coastal regions with warm surface water and colder deeper water, but the Caribbean (including Florida) has this in spades, and the same is true in Southern California and Hawaii. Geothermal power using deep (>10 km) boreholes is being used in several places in the Western US (and Mexico and Canada) based on technology that was developed in the Philippines and New Zealand - Combustion Engineering did a deal with the Filipinos to effectively trade nuclear power plants for geothermal power plants in the 1990s. Between these and tons of wind turbines, solar cells and solar heating power stations, cogeneration at industrial plants and refineries and the growing viability of space-based solar power thanks to the ability to put satellites for it in orbit in pieces and then assemble them up there makes the energy problems easier. Fusion hasn't hit the mainstream there....but its close, and those involved are gathering tritium and deuterium to be ready for when it is indeed viable.
Greenland becoming exploitable means 20% of Earth's freshwater rejoined the ocean, so seas rise enough to imperil coastal cities around the globe.
Not all of the ice is gone by any means, just enough of it that the mines can work. The ice has been receding there for many years, and while not all of it will go, some of it will, and the development of mining able to go through the ice to get to the deposits underneath. The greater water in the atmosphere in this world also reduces some of that concern. Sea levels have gone up, but only in inconsequential amounts (around 10-15 cm), and as carbon emissions in most of the world have started falling, the problems of climate change will balance themselves out.
As a semi-Green, sustainable fisheries is a massive step in the right direction.
Finding solutions to oceanic polution, acdification, and habitat loss could butterfly the worst die-off since the Permian-Triassic boundary @ 252 mya. 95% of oceanic species and 70% of terrestiral species died then.
By some estimates, it took 30 million years for various species to recover b/c the oceanic climate and thermohaline circulation were so jacked up.
The problems of ocean acidification caused by carbon dioxide will be slinking down as carbon emissions fall. As carbon dioxide is now a valuable feedstock to make composite materials, major industrial and power generation systems are capturing it and either storing it or making carbon fiber themselves with it, and by the mid-2030s in this world carbon composite is a material used in literally millions of objects in everyday life, as well as uses in refrigerant, lasers and other inert gas applications and is starting to be used to make isobutanol using genetically-modified bacteria and photosynthesis. The problems of ocean acidification are also why most operations to extract calthrates are quite substantially regulated. Carbon nanotubes and growing graphene usage will also reduce the amount of carbon released into the atmosphere.
For the tl;dr crowd, the earth will be fine, life finds a way, but it doesn't give a fig about you personally.
Clathrate exploitation to me is a rather touchy subject- plenty of energy, but methane's role as a greenhouse gas (60X more powerful than CO2) and how huge the quantitites involved happen to be could really jack the climate up for millennia.
Calthrate exploitation is done very, very strictly for the very reasons you describe. The potential for disaster if done wrong is massive, and as a result the operations of such operations are regulated not terribly different from how nuclear power plants are and the operations must have backup plans in case of primary extraction system failures.
Beyond global disaster to s/t less vexing, like Cuba- hmm...Cuba's not as bloody minded as or delusional as DPRK. Why couldn't it find a migration plan away from socialism a la Yugoslavia or Vietnam or China?
If the gates between Cuba and US were opened in 2005, give folks a decade to process the new info and find ways to exploit the situation with a lot of help from the Cuban-Americans as the Chinese diaspora helped the PRC once it opened up, things could be developing at explosive-levels of growth from 2015 on.
How much the average Cuban benefits from it's another story.
Sure politics are a mess, but I just can't see Cuba imploding that bad.
Cuba petitioning to be a US state?
Really?
NEUMA! Ni en un millon anos! I refuse to say ASB, but no.
The only time I see Cuba becoming a US state is basically butterflying the Platt Amendment and assurances Cubans are American citizens able to vote, regardless of what color they are really early (ca 1905) which would make US Southerners blanch, catch the vapors, whatever.
By the 1930's or 1940's they were used to running themselves and doing pretty well. People talk about how bad Argentina lost ground in the 20th century, but Castroite Cuba barbecued its economy and quality of life to a degree only rivalled by Cambodia when the Khmer Rouge took over.
Puerto Rico's had its massive problems with 1/20th the population that the mainland could comfortably ignore and did.
Cuba OTOH would be a bleeding mess for decades. People in DC and troops on the ground in Cuba in 1900 knew it and wanted no part of it,
It didn't hurt that the Moro insurgency in the Philippines gave the US army and marines a vivid, current example of how ugly that could get.
At any rate, love the TL but find a couple of quibbles.
To be fair on this one, the reality is that Cuba is not gonna be a US state. It will remain an independent country for the reasons you describe, but within a decade or so it will be more or less totally reliant on America for its economy and much of its cultural lead. I've had the idea of a fast-ferry services between Miami and Key West to Havana and seaplanes between them, with the country making great economic headway in the decades to come, but they will end up being a middle point between America and Latin America. The only reason its being talked about now is the country's pitiful economic state and the huge Cuban-American community, which is also massively politically influential in several places in the United States, particularly Miami, of course.