I don't think it is difficult to lead a life that is eco-friendly.
I don't think it requires an enormous amount of effort to live in an environmentally friendly way.
ご質問ありがとうございます。
① "I don't think it is difficult to lead a life that is eco-friendly. "＝「環境に良い生活を送ることが難しいとは私は思いません。」
② "I don't think it requires an enormous amount of effort to live"＝「生きて行くのに物凄い努力が必要だとは思いません」
"in an environmentally friendly way."＝「環境に優しい生き方で。」
ご参考に。
I don't think it's hard to live a lifestyle that's easy on the earth.
I think it's pretty easy to live in a way that's eco-friendly.
この場合、次のような言い方ができますよ。
ーI don't think it's hard to live a lifestyle that's easy on the earth.
「地球にやさしい生活を送るのは難しいことではない」
ーI think it's pretty easy to live in a way that's eco-friendly.
「地球にやさしく生きるのは結構簡単だ」
ご参考まで！
アメリカ合衆国 
カナダ 
