...which is not the case here at all as there are endless links to _research_ on climate change being real and man made. Some of which can be found in the 500+ references on the linked wikipedia articles.
There are many smaller examples of OS projects in Haskell, but for better examples of production systems you only have to look to areas requiring high assurance such as finance, where a number of large companies use Haskell and other functional languages. (BoA, Barclays, Credit Suisse, Standard Chartered, etc.)
It's true that there a lot of Haskell blogs focused on research level Category theory, but the concepts there don't need to be used or understood for high quality, production ready code. I'm actually not a Haskell guy, and very much of the mindset that you should use the right tool for the job, but being dismissive of languages with unique features such as being lazy by default is shortsighted.