The Story: "Come Slowly Death, Come Slyly!" by Denny O'Neil, Dick Dillin, and Joe Giella. Continued from last issue, Green Arrow arrives just in time to save the acid-headed Batman, Black Canary, Atom, and Vigilante.
Meanwhile, Superman and Green Lantern, on a environmentally decimated far-off planet named Monsan, find a lone, dying survivor. He explains that the planet's former leader, named Chokh, ended up destroying the planet and plans to use pollution to destroy other worlds.
As their leaving, Green Lantern plans to blow the entire planet up because its a lifeless rock, but Superman stops him, saying the Monsan should remain as an example, a warning, of what not to do.
Of course, it's this Chokh guy that's behind all this, and the JLA(and the Vigilante) find their way to him. The rip off his hood, and he begins to choke on all the fresh air!
Roll Call: Superman, Batman, Green Lantern, Green Arrow, Atom, Hawkman, Black Canary
Notable Moments: This issue features one of those Statement of Ownership things, so as of 1970, Justice League of America was selling an average of 253,000 copies a month, a little more than 50% "sell-through", which surprises me a little--that's not that great a number, and I always thought JLA was one DC's better sellers.
The Mail Room header is changed again, this time in a really goofy way:
DC realized Green Arrow's look was out of date, so someone grabbed a marker and added a few whiskers to Ollie's face, but left the short-sleeves and solid-green tunic alone. Whoopsie!
Plus Snapper is still on there. Some wounds don't heal.