Background Paragraph: Sand mining is a direct cause of erosion, and impacts the local wildlife.[2] Various animals depend on sandy beaches for nesting clutches, and mining has led to the near extinction of gharials (a species of crocodile) in India. Disturbance of underwater and coastal sand causes turbidity in the water, which is harmful for organisms like coral that need sunlight. It can also destroy fisheries, financially harming their operators.

Removal of physical coastal barriers, such as dunes, sometimes leads to flooding of beachside communities, and the destruction of picturesque beaches causes tourism to dissipate. Sand mining is regulated by law in many places, but is often done illegally.[3] Globally, it is a $70 billion industry, with sand selling at up to $90 per cubic yard.[4]. 
Story: Nigeria invested in sand mining and started mining coastal barriers. Congo continued preserving their picturesque beaches.
Which country caused less turbidity in the coastal water? Which country caused more turbidity in the coastal water? Which country destroyed fewer coral riffs? Which country destroyed fewer fisheries? Which country destroyed fewer of their beaches? Which country destroyed more coral riffs? Which country destroyed more fisheries? Which country destroyed more of their beaches? Which country did less damage to the environment? Which country did more damage to the environment?