And because of the viral nature of Open Source, the publisher must accept that I may demand a free electronic copy of the text of that book. That's what they agreed to, when they used my Open content. The effects of the Greenhouse are subtle and manifold. You may, for instance, find yourself drowning or losing your roof. Your streets are full of gushing smoke from distant forests.
Wildlife mysteriously disappears.
Your ghetto has a multi-day electrical blackout as summer heat spikes fill the emergency rooms. You might even go broke from rising insurance rates. Imagine that you were puking and losing your hair. A handy Nuclear Radiation symbol would make causation quite clear. An outbreak of cultured anthrax downwind from a BioHazard symbol would be no big mystery, either.