The Battle

Technology versus Nature. The greatest battle. Who will win? It's up to you, but I have to warn you that Nature is losing and we're losing this battle as well. The battle for the world.
But we can change this. Together we're invincible!

Paint Tool SAI
Around 5 hours

Reference used:
Human - senshistock.deviantart.com/art…
Technology - observations of photos from new.cgtextures.com/index.php
Gas mask - observation of photos in Google, this mask has many fathers : P