Translation of ökologisch

He suggested that Sofia or Linda speak with his student (Jack) directly on the following number: X. Jack will be happy to share his techniques, experience and protocols with you guys. Just call him.
The belief of somebody that a race or a group of people to which he belongs is superior to another. Even though the word itself stems from the word 'race', its meaning must be generalized.
We returned before dusk, as we were afraid of not finding our ship in the dark. Once on the ship we decided to go for night swimming again in the open ocean. A few women on little boats approached us.