The Brazilian highlands are not in Brazil
More carbon dioxide is stored in the ocean water, making it more acidic, which is dangerous for most corals and many animals with small niches
The common geographic factor for Egypt and the fertile crescent were the big rivers, they made big alluvial deposits on their shores each year and allowed the people to have sufficient amount of food production. That opened the gates for civilizations to flourish in this places.
The harvesting of medical plants and shop expansion can lead to deforestation
