Cap & Trade, explained...

by the helpful Planet Moron:

There are two types of renewable energy to consider:

1. The kind that is really expensive.
2. The kind that doesn’t exist.

The expensive kind is helpful in that the additional resources devoted to it will help slow down the economy, while the kind that doesn't exist is helpful in that the additional resources devoted to it will help slow down the economy.

So, there's really no downside.

You really should RTWT.