This is the 3784th most frequent Russian word.
экологической
The Russian word "экологической" means "ecological" in English.
In this sentence, 'экологической' describes an attribute of 'теме' (theme), serving as an adjective that specifies the type of theme.
Эта книга посвящена экологической теме.
This book is dedicated to the ecological subject.
Here, 'экологической' modifies 'важности' (importance), indicating that the importance is related to ecology.
Мы говорили о проблемах экологической важности.
We talked about problems of ecological importance.
In this example, 'экологической' refers to 'направленности' (orientation), showing that the orientation pertains to ecological concerns.