The Brazilian Amazon is the size of Western Europe, and in the 41 years I have lived in the region and worked on problems of deforestation, an area larger than France has been cleared. Over the decades, I have watched as economic cycles, swings in commodity prices, and land 

speculation have led to peaks and valleys in the clearing of the Amazon, with 1995 setting a record for destruction: 11,200 square miles — an area the size of Belgium — fell to loggers, cattle ranchers, and farmers.

When the annual deforestation rate in Brazil’s Amazon plunged from nearly 11,000 square miles in 2004 to 1,700 square miles in 2012 — an 84 percent decline — I was of course relieved. But I had witnessed too much destruction in the Amazon to celebrate. Unfortunately, these widely publicized declines led not only to the impression among the international conservation community that Amazon deforestation was finally ebbing. It also led to a dangerous illusion taking hold in the capital of Brasília — the belief that deforestation was thoroughly under control, and thus the government could build roads, dams, and other infrastructure at will in Amazonia, without consequences for the world’s largest rain forest.

Clearly, that turned out not to be the case. Deforestation has trended upwards since 2012, with a sharp 29 percent increase in the rate of clearing in 2016.

(Philip Fearnside. https://daily.jstor.org, 22.04.2017. Adaptado.)

De acordo com o primeiro parágrafo, o autor do texto afirma que, no período de 41 anos,