Solution:Kalahandi, Sambalpur, Bolangir, and Koraput are the leading producers of bauxite in Odisha.• Odisha is said to have the world's 4th largest bauxite reserves with an estimate of 1530 million tonnes.
• Of these, 20 million is located in Keonjhar, Sundergarh and Phulbani districts and the rest in Bolangir, Bargarh, Kalahandi, Rayagada and Koraput districts.