Across
- 3. Responsible travel to natural or ecologically fragile areas intended to observe wildlife, conserve the environment, and sustain the well-being of local populations.
- 5. A dense, tropical rainforest characterized by high annual rainfall and continuous canopy cover, particularly referring to the Amazon Basin.
- 6. A traditional cowboy or nomadic cattle herder of the South American pampas, primarily associated with Argentina, Uruguay, and southern Brazil.
- 8. The wide, lower tidal mouth of a river where freshwater streams meet and mix with ocean saltwater.
- 11. A peasant farmer or agricultural laborer living in a rural area of a Spanish-speaking country.
- 14. A fuel mixture consisting of unleaded gasoline blended with ethyl alcohol (ethanol), typically derived from agricultural crops like sugarcane or corn.
- 16. High-altitude plain or plateau, specifically the extensive elevated inland region of the central Andes in South America spanning parts of Bolivia and Peru.
- 17. An area of rolling hills or gentle slopes lying at the foot of a mountain range or between mountains and coastal plains.
- 19. An extensive, flat, treeless grassy plain or savanna, especially used in reference to the llanos basin region of Colombia and Venezuela.
Down
- 1. The upper geographic or altitude limit beyond which trees cannot grow due to low temperatures, thin soils, or high winds; also termed the tree line.
- 2. The clearing, logging, or removal of forest trees from a land area, converting the land to non-forest uses such as agriculture, ranching, or urban development.
- 4. An archaic demographic term denoting a person of mixed Black African and white European ancestry (Note: generally considered outdated or offensive in modern usage).
- 7. A long, steep slope, cliff, or scarp formed by erosion or faulting that separates two level or gently sloping land surfaces at different elevations.
- 9. A claylike mineral mixture comprising hydrated aluminum oxides, constituting the primary commercial ore used in the production of aluminum.
- 10. An extensive system or group of parallel mountain ranges, together with their associated plateaus, basins, and valleys (e.g., the Andes or the North American Cordillera).
- 12. A high-altitude tropical alpine ecosystem located above the continuous forest line but below the permanent snowline, characteristic of the northern Andes.
- 13. The dry, scrubby interior backlands region of northeastern Brazil, subject to severe recurring droughts and covered by caatinga vegetation.
- 15. The vast, fertile lowland plains of southern South America, extending across central Argentina, Uruguay, and southernmost Brazil.
- 18. A dense, low-income informal settlement or shantytown located in or surrounding a Brazilian urban area.