Armenia's environment became severely polluted during the Soviet period due to heavy industrial development and lack of environmental regulation. Several highly polluting factories were closed in the late 1980s due to pressure from environmental groups, though some reopened due to economic needs. While Armenia now has environmental laws, protection efforts are ad hoc and issues remain such as reliance on an earthquake-prone nuclear power plant, deforestation, soil contamination from pesticides, and vulnerability to climate change impacts.