It turns out that there were about nine different environmental factors, some, rather subtle ones, that were working against the Easter Islanders, and they involve fallout of volcanic tephra, latitude, rainfall.
Resulta que hay hasta nueve factores medioambientales diferentes, algunos de ellos bastante sutiles, que conspiraban contra los rapanui, y que incluían las lluvias de tefra volcánica, la latitud o las precipitaciones