wow. the colours are beautiful the way you put them together, and the eyes are so deep...full of misery and regret...like he/she is looking on the world today, sad and regretful of how they treated it. i dpnt quite like the black in it, it would be improved by erasing a few, but the overall effect is stunning. I like the way it sort of builds up in the middle, makin it look like a rubbish pile, or dripping dirt and sewage. this is very intimidating. I like the reds and greens you used. the shades are good, and they contrast with a good balance. good job.
First of all, I love the concept. Showing how pollution affects humanity by actually using the human face... Wow. And the emotion conveyed in the eyes... I think that the skill of the whole picture resonates from there. I see sadness, I see a kind of forlorn regret that just solidifies the impact of the whole idea. So.
I like how the coloring hints to erosion and covering of the face, or "Earth", especially what I assume is the nose.
I've seen and heard of ideas like this one, yes, but I think it's how well you executed this one that makes it such a gem. I'd love to see follow-ups of the same abstract interpretation, because I'm sure you only get better and better. Speaking of which, I think I'll hit up your gallery now. Needless to say, I'm both impressed and "impacted."