Fire in the Blood — Dale Ibitz

Global warming is playing havoc on Earth, and when 17 year-old Haley tumbles to a parallel world, she discovers that Earth's issues stem from a war between the Eyids, the gods of nature. Because her necklace is a stone that holds the power of the Air Eyid, Haley is called upon to help stop the war. But Haley has a problem. Actually, two problems. One named Tuggin, and one named Ian. Both lie to her. Both have secrets. And neither are who they say they are. With her stone of power, Haley's forced to make a choice that will decide the fate of all the worlds. But who should she trust, who should she fight, and who is the one with fire in his blood bent on betraying them all?