Yes, all those airplanes buzzing away in the skies are covering the planet with "TEL". Did you ever see Pussie Galore in Goldfinger when they poisoned the area around Ft. Knox. That's what it must be like going outside these days.
Yeah, that lead in av-gas must be nasty, nasty stuff. My dad was a pilot and aircraft mechanic all his life. He used to wash parts in av-gas. Barehanded.
He died young...97 years old. He also ate a lot of red meat, smoked a cigar when he felt like it, and had a glass of good whiskey when the mood struck him.