Topsoil Quotes (2 quotes)
In a hundred and fifty years the United States has lost one third of its topsoil. And I think about two hundred fifty million acres are turning into desert because of overgrazing and other mismanagement.
From interview collected in Pamela Weintraub (ed.), The Omni Interviews (1984), 82.
Leaders who assert they will not concede one square meter of national territory to an invader should think of the hundreds of square kilometers of topsoil eroded from their countries each year.
Quoted, without source, in Epigraph in P. G. Dhar Chakrabarti (ed.), People, Planet, and Progress Beyond 2015 (2017), 33. [Please contact Webmaster if you know the primary source.]

In science it often happens that scientists say, 'You know that's a really good argument; my position is mistaken,' and then they would actually change their minds and you never hear that old view from them again. They really do it. It doesn't happen as often as it should, because scientists are human and change is sometimes painful. But it happens every day. I cannot recall the last time something like that happened in politics or religion.
(1987) --
Carl Sagan
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