deforestation
water quality
soil erosion
land use
desertification
agriculture
carbon emissions
runoff
forest degradation
crop management
climate control
farming systems
climate change
watersheds
ecology
erosion
drought
finite resources
environment*
desert reclamation
ecosystems
logging
mining
dam construction
subsistence farming
gas flaring
soil erosion
environmental degradation
Environment and Economics in Nigeria by 
Where Vultures Feast - Shell, Human Rights, and Oil in the Niger Delta by