First up is Countdown by Yuumei!
This piece was created by Wenqing Yan, also known as Yuumei on deviantART. She is a Practice of Art major at UC Berkeley with a focus on environmentalism and cyber activism. In her description, which can be read here, she says "Change is not waiting for the scientists and government to come up with the solution, change starts with the little things we can do everyday". This pretty much sums up the urgency of the picture and the attitude people should have when it comes to preserving the environment. I hope she gets more recognition for this, as well as her other stunning pieces of art.
