If climate-based disasters, including their chain reactions (drought -> famine; sea level rises -> migration -> disease; etc.), cause a 10% reduction ("decimation") of humans by the close date this resolves YES. Otherwise NO after close.
10% reduction might mean any one or mix of factors:
outright deaths
decrease in fertility causing population decline w/in timeframe
reduction in population replacement curves, over the global average
etc.
Our baseline for decrease in population not due to extraordinary deaths will be framed around the 2022 UN Projections (currently located here). This is not the defining point of truth if solid analysis and data comes to light, especially considering that the UN already takes some climate trends into account, but it's a great indicator of unexpected change, such as if life expectancy, fertility, or replacement rates drop precipitously in later versions of their projections. See also the OWID data linked in this comment on the 2050 market.
Some 2050 numbers from the 2022 projections (the data is less clear for after 2050):
9.7 billion humans
16.4% aged 65+
Fertility (births per woman): 2.1
Life expectancy: 77.2; 74.8 (M), 79.8 (F)
Since there aren't as solid projections this far out, the data referenced is subject to change.
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2050: /Stralor/will-climate-change-decimate-humans
2070 (this): /Stralor/will-climate-change-decimate-humans-9f63de4b27a2
2090: /Stralor/will-climate-change-decimate-humans-a6501c666cd9