'Earth Care' is a term used in Permaculture to describe one of it's 3 core ethics (earth care, people care and fair share). It simply means 'care for the earth'.

What's an Earth Care Project?

An earth care project is made up of people who share the ethics of permaculture. It is any project that cares for it's environment: Earth.
It concerns itself with a sustainable future and knows that such a future rests on the foundations of healthy soil, on which stable eco systems can grow and provide for the needs of it's local inhabitants. An earth care project regardless of its particular focus, is always, as a consequence of it's actions, contributing and building healthy soil and a healthy eco system. It takes responsibility in looking after the earth while making it's living.