In addition to that role, oceans are a complex and rich ecosystem on their own — helping to sustain life on land. (wxshift.com)
Some small island states are now trying to restore once - rich ecosystems while sustaining their economies. (dotearth.blogs.nytimes.com)
Thinking about the future, he concludes: «I am hopeful that the current time and money bundles in education get unbundled so that there is a much richer ecosystem of options available for kids.» (educationnext.org)