This is the 1107th most frequent Japanese word.
関心
Interest; concern.
Here, '関心' (kanshin) is used to indicate a general interest or fascination towards the subject of history.
彼は歴史に関心を持っています。
He has an interest in history.
In this sentence, '関心' highlights the significance of being mindful or concerned about environmental problems.
環境問題に関心を持つことは重要です。
Taking interest in environmental issues is important.
'関心' here suggests an absence of interest or disregard towards a specific matter, in this case, the speaker's work.