Violent spring floods.
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the early civilizations began in Africa but most exact in Zambia
The economy of early civilizations was based around agriculture.
Inca
The Nile River was the axis of two early African civilizations
?
the early civilization in mexico is olmec
Food
Questions about environmental degradation and the toxicity of heavy metals challenged the inorganic pigment industry throughout the 1980s and early 1990s.
Vast Empires
Early civilizations emerged between the Tigris, Euphrates, Nile, and (sorry, blanking out out on the fourth...) Rivers.
Obviously not or we would not be referring to them as "early" civilisations.