e‧co‧lo‧gi‧cal /ˌiːkəˈlɒdʒɪkəl◂ $ -ˈlɑː-/ adjective [only before noun]

1. connected with the way plants, animals, and people are related to each other and to their environment ⇒ environmental:
an ecological disaster

2. interested in preserving the environment ⇒ environment:
ecological groups
—ecologically /-kli/ adverb:
an ecologically-sound production process

[TahlilGaran] Dictionary of Contemporary English ▲