Global warming is a big problem, and activists have tried solving with a rock concert and by paying other people to plant trees to no avail. Still, let's not pretend it's the biggest problem. Here are even greater threats:

GREATER THREATS THAN GLOBAL WARMING

* The imminent destruction of Krypton.

* The possibility of Sauron getting the One Ring.

* A fully-operational Death Star.

* Megatron getting possession of the All-Spark.

* Milo Rambaldi's discoveries falling into the wrong hands.

* Khaaaaaaaaaaan!!!

* The Joker escaping from Arkham Asylum.

* Cobra Commander and his own personal army.

* Gargamel discovering the location of Smurf Village.

* Any threat that isn't completely made up.