All you've provided are second-hand sources.
For example, the only sources listed for the Stephen Schneider quote, which is the most damning quote there and the one I would most like to throw in the libs' faces, are a book in which the quote was used (but not where it was originally written), the Limbaugh letter which used the quote, the New American magazine which used the quote, etc. In other words everything but the original source of the quote.
I do see a claim that Schneider made the statement during an interview with Discover magazine -- but which issue? I doesn't say, which seems strange. Or if the statement was only spoken at the interview but never published, what documentation exists of what he said? It isn't provided.
Unfortunately, without solid citations, these quotes are not very useful.
Trashing the Planet
Title: Trashing the Planet: How Science Can Help Us Deal with Acid Rain, Depletion of the Ozone, and Nuclear Waste (among Other Things)
Author: Dixie Lee Ray, Louis R. Guzzo
Date Published: April 1992
LOCN: TD174.R39 1992
Dewey: 363.73 20