I have installed many through the window or wall units - not a big deal. Also had a top of the line exterior/interior AC unit similar to a mini-split - not a big difference in efficiency, nor electricity used but difference in decibels - yes.
Mexico also, apparently has no official language; https://embamex.sre.gob.mx/irlanda/index.php/la-embajada/acerca-de-mexico
"Official Language: No official language, most of the mexicans speaking spanish but various languages spoken by indigenous populations."
Exactly. I have been corresponding with a world expert, a young Mexican living in Veracruz. He has done erosion control and water directive projects for agricultural lands in Mexico. I brought up the phytoremediation aspect with him and we are working up to potentially collaborating on trials to reduce pollution at the Lerma River - Lake Chapala interface.
Vetiver grass is slowly expanding in Mexico as a superior sewage treatment pollutant mitigation technique. It can be planted or used floating in lagoons. It is non-invasive.
https://www.sciencedirect.com/science/article/abs/pii/S2214785321010919
New ice age? When I was about 7 and learned about dry ice, I announced to my father that the C02 in the air would collapse to the earth making a new ice age. Weird eh?
https://nsidc.org/arcticseaicenews/