Greta Thunberg Celebrates 18th Birthday & Sticks It To Climate Change Deniers In Sarcastic Tweet!

Happy birthday to climate change activist Greta Thunberg! The 18-year-old was feeling good on her special day Sunday, sharing a very snarky message to followers on Twitter, saying: "Thank you so much for all the well-wishes on my 18th birthday! Tonight you will find me down at the local pub exposing all the dark secrets