This might not be much of a battle, but it’s certainly about a pair of awful people! Without further hesitation, allow me to introduce you to:
"First the atmosphere, then the world!"
Powers: Mechanical engineer and chemist that attended Cornell
Crimes Against Humanity: Discovered dichlorodifluoromethane (the CFC dubbed Freon) and added tetraethyllead to gasoline (and called it “Ethyl” even though it was essentially “lead”)… We all know what CFC’s did to the ozone and what lead does to people. According to a unnamed source on Listverse (apparently Wikipedia):
He is considered to be the man that – “had more impact on the atmosphere than any other single organism in Earth’s history.”
Current Whereabouts: The ground. He died in 1944 after getting tangled in the cords of a contraption… that he designed.
A dose of his own radioactive medicine.
Powers: Radioactive (after being given radioactive iodine, natch)
Crimes Against Humanity: Well… the dude’s a pedophile. He’s been charged with five accounts of downloading indecent pics of kids since 2006, and 87 prior to that, but the extra crap part is this:
In 1993 he left the banking world to set up The Tutors Group at Blythe Hall School. It employs more than 600 staff and works with more than 3,000 children, teaching infants to A-level students study skills, essay planning and examination technique. (via DailyMail UK)
Current Whereabouts: Unknown. He escaped trial and was almost captured on his way to Ireland from England, but he flashed his radioactive card and they released him. Let’s see… this happened a long time ago, way, way back in… February. Of this year. Yikes!
AWFUL BATTLE… GO!
monkeyBLOG monkeyDO 
Pedophilia trumps incompetent science in terms of awfulness.
That Leopold stuff is wacky. I think he has an island with his face carved into a volcano that, for some reason, no one can find.
Meh I find that pedophile to be rather tame. I mean, all you say he’s been accused of is downloading pics? I assume if he were accused of physically abusing kids that would have been mentioned, but it’s not. Looking at pics is still creepy and wrong, but it’s not like he’s hurting anyone. Whereas Midgley, who I’d already known of, has probably hurt every living thing on this planet in some way.
Sure Midgely affected a greater number of people, but it was through bumbling and incompetence. You could both punish him and stop him, assuming he hadn’t already killed himself through incompetence, by just saying “ok man, no more chemistry set.”