PARAGOMINAS, Brazil—When Mauro Lúcio Costa began rearing cattle in the 1980s in the Amazon, he took to the forest like everyone else: with a chain saw and a match. Ranchers like him eventually cleared an area as large as California from the world’s largest rain forest. Mr. Costa broke ranks in 2002 and started employing more sustainable techniques,...

Source: Wall Street Journal May 19, 2018 12:56 UTC