The negative impact of the Moai structures in the Easter Island? The lecturer and the reading passages talk about the Moai structures located at the Easter Island, and how their placing generated a negative impact in the natural environment of the island and their population. Following it is presented two ideas mentioned both by the lecturer and the reading passage: First, the reading passage talks about the way to place the Moai structures, which it was based on creating tracks made of long rollers made of wood, product of cutting down plenty trees in the island without other purpose than moving the statues. In contrast the lecturer suggests that might not be true, due to recent investigations has demonstrated that the method used for it was based in ropes, where basically the statue was fastened and together side to side movements the structure could be transport and finally be placed. Also, recent researches have shown that the introduction of rats (thanks to the boats bringing merchandise and food) might have had a bad effect in the generation of new plants. Secondly, the reading talks about how the major population declined due to the deforestation problem led by the situation described above, where also it claims that the population suffered a reduction of food that led to cannibalism. The latter is contradicted by the lecturer, because according with recent investigations the population at the time of the Moai's construction was not above 1200 people at the 400 a.c. Which means that actually there were never the 20.000 people living in the island as substantiated by reading.