The Sustainability Paradox

In many cases, that the very sort of signal we're looking for could have also been caused by these naturally occurring causes. So strong signals might be coming from something else and more specific signals that we might look to just might be too weak to ever possibly observe or to really make much out of. This is an interesting paradox. The stuff that you would expect any industrial civilization to do also has other explanations. And so it's not conclusive that it was an industrial civilization.