The Law of Contagion

There are two ways to avoid contamination. You see the bubbles around those men and women hovering over the fields? Yes, like this bubble of yours. That is one way. Not one speck, not one wisp can penetrate, and thus purity is maintained. It takes all of their time, checking and rechecking their bubbles.

The other way?

Those figures there, in the muck. No, I don't know their sex. Who could tell? They are so filthy, so engrimed that they are part of the pollution surrounding them.

Your bubble will disappear in a few moments.

Unless you stop it.

Choose.