Ian Somerhalder may just be the hardest working man in Hollywood — and he’s not even shooting The Vampire Diaries right now. We’re referring, of course, to Ian’s philanthropy and activist work. The actor has been jetsetting around the world since TVD wrapped filming in April, and it’s finally catching up to him. Check out his recent Instagram...

“Flattened... Jet lag of two months of movement,” Ian captioned a photo of himself lying exhausted on the ground. “On the floor of my Atlanta office-staring blankly at the ceiling, motionless;) Wow. Hyperbaric time. Need to prep another congressional testimony for next week testifying in Washington on international species conservation. Give me some strength world-shoot it my way! Thank you!” And to think, this was how Ian finished TVD filming in April: taking a nap in his office. At least, then, he was on a couch!

Ian has had a pretty busy summer. Earlier this month, he was designated a UNEP Goodwill Ambassador in Barbados. Though he may be tired from his hectic lifestyle, he seems to genuinely love it. While in Barbados, he shared this photo, along with the caption: “In Parliament in Barbados about to walk into a room with heads of state and the United Nations Environment Program to make my designation speech as UNEP Goodwill Ambassador. Wow. So surreal... Thank you all for standing here today with me- your voice is so loud. Your compassion so powerful. Thank you- now let's make so [sic] serious shit happen. Lets make sure everyone around you know climate change is real.”

Though Ian has many causes, the battle to combat climate change and to raise awareness of the serious issue seems to be his main focus right now. In addition to his work with UNEP, Ian has spent some time promoting the Showtime series Years of Living Dangerously, which highlights how different parts of the world have been affected by climate change. Ian appeared as one of the program’s  “celebrity investigators,” traveling to North Carolina to try to help persuade the Evangelical community there to join the fight against climate change.

Yep, saving the world is tiring work, but Ian Somerhalder sure does make it look sexy.

Kayti Burt is a contributing writer for Wetpaint Entertainment with a penchant for all things pop culture. Follow her on Twitter and Google+!