After I saw the answer for "Tallest Average Height" was the Netherlands I was stunned. It took me at least 2 minutes trying to figure out why that was wrong to understand that you wanted the tallest average height of the citizens and not the tallest average elevation, which would put the Netherlands close to the bottom.
At this point we can only assume the Dutch have evolved to be so tall in order to make up for the land being so low. It was the only way to even it out
Africa, America and Oceania (incl PNG) probably have a lot fewer languages spoken. The reason is a lot of those languages are actually dialects, but we haven't done enough research on the languages to determine which ones. Though, since we don't know for sure, let's consider the official estimates correct.
What is the source for highest people? According to https://en.wikipedia.org/wiki/Template:Average_height_around_the_world Bosnia is just 'higher' than Netherlands, although I don't really understand the data as Netherlands appears at least 4 times.
Three of those four have been "self-reported" or "estimated". The lower one has been measured accurately. Mexico seems to a tad higher than Bosnia, but that's only central so you can't really rely on that.
Anecdotally, when I was in Bosnia, I do remember that everyone seemed particularly tall! Then again, so have all the Dutch people I've ever known. Maybe because I'm 4' 11". ;-) (Just kidding about that last part! I'm a reasonably-tall-for-woman 5' 7".)
Is "most carbon dioxide emitted" in total or per year? Cuz it's different if you're talking about cumulative amount (total) vs emission rate (per year).
"Lowest elevation on land" literally makes no sense. I just Googled it, I typed the 10 countries with lowest elevation but they were all islands. I suggest changing it to "Lowest elevation (Excluding island countries)"
I knew I was taller than the average (of most countries), but hadnt expected to clear such a high %.
I thought Victoria and Baikal were larger than the Great Lakes too... Maybe this question needs a look.
Canada is #1, followed by Russia, then the United States.