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OpenDissertations is an open-access database built to assist researchers in locating both historic and contemporary dissertations and theses.
Content Includes:
Indexing and abstracts for more than 1 million records.
Open access full text for more than 15,000 records
Subjects Include:
Global climate change
Green building
Pollution
Sustainable agriculture
Renewable energy
Recycling
Click on the link above
Choose the tab "databases"
Check the box next to the "OpenAccessContent" database to search for articles available free on the web
ProQuest Publicly Available Content Database
Thousands of open access sources
Multi-disciplinary, global coverage
Includes journals, dissertations, pre-prints and more