No citation. Just common knowledge and common sense.
"Common knowledge" is the worst tool out there for determining scientific fact. One's gut does not trump data.
Ever heard of "snow birds"? People who spend every winter in Florida or Arizona?
My mother is a native of Massachusetts, but has lived in Texas since 1986 and even she needed to go our time share in Florida for a few months in winter. That has nothing to do with people dying from heat spells or cold snaps. I'm looking for actual data. Do you have any?
Ever looked to see where the most lush and abundant plant and animal life grows? It's not in Canada.
It's also not Coastal Peru, Niger, Sudan, Saudi Arabia, Oman or western India, yet some of those areas are very warm. That is a lot more to verdant landscapes than the latitude.
When is the last time you've heard of a heat-related death in the US? By contrast we had cold-related deaths just this past winter... And if you want a citation:
Study: Cold kills 20 times more people than heat (that's just the first one that popped up when I googled it just now...)
Great, an actual citation of an actual study. Did you even read that stats?
>> The study — published in the British journal
The Lancet — analyzed data on more than 74 million deaths in 13 countries between 1985 and 2012. Of those, 5.4 million deaths were related to cold, while 311,000 were related to heat. <<
As far as the U.S. goes,
https://www.cdc.gov/pictureofamerica/pdfs/picture_of_america_heat-related_illness.pdf
>> From 1999 to 2010, 8,081 heat-related deaths were reported in the United States. In 5,783 (72%) of these deaths, the underlying cause was exposure to excessive heat, and heat was a contributing factor in the remaining 2,298 (28%) deaths. <<
That said, the concerns from global warming aren't that people are going to be dropping like flies. Health wise, we're likely to see more kidney problems, including renal failure from dehydration in third world counties. But the bigger problem is who climate change will affect the ability to grow crops in already crowded countries with low food production. The refugee issue we see now will only increase as equatorial countries have more and more trouble growing food (and no, an increase in atmospheric CO2 doesn't magically increase crop yields.
https://phys.org/news/2018-04-carbon-dioxide-boost-plantgrowth.html
Here's another thing you've never seen a citation for:
- Proof that our current average temperature for the earth is optimum for life.
That seems to be the assumption... but any proof?
1. It's not optimum for life. Life, including human life, will get along fine if it's significantly warmer.
2. Life as we know it (meaning humans), however, does seem to be ideally suited to about 57°F.
Umm... your point?
Even if a mushroom gets its carbon for its carbohydrates from the ground, when you "dig" into where that carbon came from... it came from the remains of other plants... which got that carbon from CO2 in the air. So, still... even those carbohydrates came from the air.
You have never consumed a carbohydrate in your life that did not get extracted from the air by a plant.
Mushrooms aren't plants. That's difference between "common sense" and actual knowledge.