In less than two months, environmentalist and public opinion in Colombia have furiously reacted because of the announcement of the government saying possible oil extractions close to a natural reserve where one of the most beautiful rivers in the world is located. Cano Cristales River is well known worldwide as the river of five colors due to aquatic plants resting on the bottom of its course. The yellow, red, black, and green algae move calmly and rhythmically by the flowing of the river, showing beauty as a feature of simplicity and elegance. Such natural treasure could be threatened by something so common and current as oil. 

Although The Environmental Protection  Agency of  Colombia proclaimed that the oil extraction plant won't be located inside of the natural reserve, people afraid that such operations can affect the balance of the place. It is not  a secret that the concession gained by Hupecol a US company  allows the plant starts operations near to the three more important tributaries of Cano Cristales; Guayabero, Duda, and Lozada. It was so energetic the public reaction in social media that the president of Colombia Juan Manuel Santos stopped the license until further studies could confirm no evidence of natural degradation in Cano Cristales and natural reserve due oil extraction.