opening up (noun) colonization: settlement of area
Sinonime: contaminated,
dangerous, deleterious,
destructive, harmful, insalubrious,
lethal, noxious, pernicious, poisonous,
rotten, septic,
spoiled, toxic,
unhealthy, unnutritious, venomous,
virulentAntonime: healthful, nutritious,
wholesome