By Diego Oré MEXICO CITY (Reuters) – More environmentalists were killed in Latin America than any other region in the world last year, according to a report by advocacy group Global Witness, underscoring the growing threat to activists in the resource-rich region. Of the 200 environmentalists killed globally in 2021, three-quarters of them were from Latin America, the report said. The total is less than the 227 killed in 2020, but represents an increase for countries like Mexico, Brazil, Nicaragua and Peru, which together account for just over half of total deaths. Mexico had 54 cases of envir…