It gives you the land amount that isnt desert or mountain. And its from the university of texas. Theres a million others that debunk this as well but seeing as we are talking about texas i figured let texas have a voice
,Not an academic article and the link within that website doesn't work. That website looks like it was made by some guy in his grandma's basement. Also, you should note that he states that it doesn't take into account the lakes and rivers but gives us the amount of land that is HABITABLE, which has to be around lakes and rivers. Quite the blunder lol.