我々の健康にも自然環境にもあまり悪影響がないということが報告された を英語に訳すと？

下記、いずれもOKです。

It was reported that there was little harm to our health or natural environment.

It was reported that almost no harm was caused to our health or natural environment.

It was reported that neither our health nor natural environment was seriously affected.

It was reported that the harm to our health or natural environment was minimal.

According to the report, our health or natural environment was hardly affected.