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. Perhaps the most subtle of them is that it turns out that a major input of nutrients which protects island environments in the Pacific is from the fallout of continental dust from central Asia.
Ternyata ada sekitar 9 faktor lingkungan yang berbeda, beberapa agak tersembunyi, yang merugikan penduduk Pulau Paskah hal-hal itu mencakup jatuhnya debu volkanis, ketinggian, curah hujan. Mungkin yang paling tersembunyi adalah bahwa masukan nutrien utama yang melindungi lingkungan di Pasifik bersumber dari jatuhnya debu benua dari Asia Tengah.