Citation very much needed. Everything I've read about global warming tells me the eventual GDP impact of 'business as usual' warming will dwarf everything else. It's not just the flooding. It's the rise in wet bulb temps, the droughts, the forest fires, etc. This does not magically end at 2100 just because our projections end there. This goes on for millenia.
I cannot fathom, how one could look at the facts and science and come to your conclusion.
To you this is an eventuality, to them the problems are right now, it is right now that they need electricity for the X million people without access to it, it is right now that they have to use huge amounts of concrete to build infrastructure, it is right now that they have to expand their transport/truck fleets to transport food to themselves or the million/several hundred thousands of Roinhya which arrived to the country in the last 2 years
Walk 100 miles in the other person's shoes
The mainstream “facts and science” does not support the conclusion that climate change will eventually “dwarf everything else” in the economy, not even for hard-hit countries like Bangladesh. The 1/3 number for Bangladesh by 2060 is one of the higher estimates I’ve seen, from Asian Development Bank. Others show less than 10%.
See also: https://www.washingtonpost.com/weather/2019/08/19/climate-ch... (“Climate change could cost the U.S. up to 10.5 percent of its GDP by 2100, study finds.”).
10% is a lot! It’s trillions of dollars, and it would be worthwhile to spend a significant amount of money to avoid it. But we need to pay attention to the science.
$1,000,000 5% over 80 years = $49,561,441.07
$1,000,000 4% over 80 years = $23,049,799.07
I don't even think the most outlandish have climate change being greater than 50% of GDP.
New technology will be adopted, but not fast enough. Bangladesh is currently at 4% renewables. But half the country doesn’t even have electricity. It’s building 10 GW of coal capacity by 2030 which will double per capita CO2 output. Gas is still the major energy source with some nuclear being built. There is nowhere to build solar or windmills, though off shore wind is a possibility in the long term. It will be many decades before Bangladesh uses primarily electric vehicles and vast numbers of ICE vehicles will be purchased in the meantime. The number of registered motor vehicles has tripled in the last decade—those are nearly all gas vehicles, and half are used vehicles imported from elsewhere. 80% are motorcycles, with very inefficient gas engines. And there are no alternatives to CO2-production for many construction and industrial processes.
Bangladesh will certainly take some measures to be greener. It has no economic incentive to use more fossil fuels than it needs to: it imports gas and coal and has no domestic industry or jobs in that area to protect. But it also can’t afford to subsidize renewables. It will deploy technologies based on true cost, and right now the cost of renewables + storage isn’t there, neither is the domestic infrastructure to go fully electric.