Humanity is quite a unique species, since it is the only one with the means to wipe itself out.
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“A person however learned and qualified in his life's work in whom gratitude is absent, is devoid of that beauty of character which makes personality fragrant.”
“If we want to implement climate protection worldwide, countries like Germany, which are capable of developing new technologies, will have to hand over some of their knowledge. We can't expect to have our cake and eat it too.”