If you look at the song lyrics, try to think about who might be talking.

Perhaps the world? How we're killing it? Or maybe even God.

"Hey you, see me, pictures crazy...."

Could that be referring to pictures of the God in cathedrals and churches? The crazy part being how we've pictured him all along? Or maybe the world. Pictures of our world, and how amazed some people are with those sort of pictures. Or, how absolutely crazy all the pictures we're seeing now are. Our forests: gone. Our air and water: polluted. Our animals: dying and becoming extinct.

Don't forget. The title of the song IS Air, Trees, Water, Animals. Everything that makes up the Earth (aside from earth itself). We're killing it all:

Air: We're polluting.
Trees: We're cutting down to no end.
Water: We're polluting it, and running out of fresh drinking water.
Animals: We're killing them directly, and indirectly (such as garbage and pollution).

"You don't care about how I feel."

We no longer even think twice when we cut a forest down, kill an animal, drink a glass of water, or work in a factory.

"Hey you, are me, not so pretty..."

We're not good people for what we've done on this world. That we can accept. And because of what we've done, our water is no longer clear, air in no longer pure, forests are becoming landscapes of stumps, and animals are just...dying. They are no longer "pretty".

"Silent my voice, I've got no choice."

In everything we do everyday, ATWA (Air, Trees, Water, Animals), have no choice in the matter. We just kill them all mercilessly. And we never hear anything about it from them, because they cannot speak.

Finally:

"All the world I've seen before me passing by...."

They've all been on this Earth longer than us. This can simply be a statement implying that.

"I've got, nothing, to gain, to lose...."

They don't. I believe this line came after the one mentioned just above, because they've been on this world longer than us, and they've always survived what has happened on the planet. Either that, or because we're killing the planet itself, no matter what we do, they die anyway, so what's the point?

That's my interpretation. Long, I know. But...hey.