Learn Turkish: Ekolojik denge açısından, bu malzemeler sürdürülebilir değil. - In terms of ecological balance, these materials are not sustainable.

Great observation! Ekolojik (ecological) is an adjective modifying the noun denge (balance). The noun denge then links with açı (angle/perspective) to form the indefinite noun compound denge açısından. Together, the structure is literally "from the [ecological balance] angle".

Let's break down the word "açısından". What suffixes are attached to the root word here?

The root is açı (angle, perspective). We add the 3rd person possessive suffix -sı (its angle), the buffer letter -n-, and the ablative case suffix -dan (from). Literally translating to "from its angle," this set structure functions as "in terms of".

The word "sürdürülebilir" looks very long! How is this adjective formed?

It is built from the verb root sür- (to last/continue). We add the causative -dür (to make continue / maintain), the passive -ül (to be maintained), the ability suffix -ebil (can be), and the aorist tense ending -ir which often turns verbs into adjectives. Altogether, it means "able to be maintained" or "sustainable".

Could I use "bakımından" instead of "açısından" in this sentence?