Colombian energy giant Ecopetrol has polluted hundreds of sites with oil, including water sources and biodiverse wetlands, BBC Eye has found.
Data leaked by a former employee reveals more than 800 records of these oil-polluted sites from 1989 to 2018, and indicates the company had failed to report about a fifth of them.
The BBC World Service has also obtained figures showing the company has spilled oil hundreds of times in the past five years. Ecopetrol says it complies fully with Colombian law and has industry-leading practices on sustainability.
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