The following links have galleries of images that are "open" or "free" which means they are not protected under the copyright law and can be used in your projects.
Public Domain Images: A safe site with TONS of free images you can use. http://www.public-domain-image.com/
Environmental Education Station: A public domain gallery with lots of great pictures of the environment.
http://web.centre.edu/enviro/Photos_files/Photos.htm
Great Lakes Photo Gallery: http://www.epa.gov/glnpo/image/
Earth and Space Gallery: http://spacelist.org/data.shtml\
The Online Zoo: Over 6,000 animal images http://www.theonlinezoo.com/
Earth Images: Images of our changing planet. http://www.usgcrp.gov/usgcrp/links/images.htm
NLIB: National Library of Images from the Environment http://life.nbii.gov/dml/home.do
Pics 4 Learning: A gallery of just about anything for educators and students. http://pics.tech4learning.com/
A compilation of the above listed sites. TONS of links to sites with images to be used in classrooms or projects. http://www.internet4classrooms.com/links_grades_kindergarten_12/photos_graphics.htm
Environmental Education Station: A public domain gallery with lots of great pictures of the environment.
http://web.centre.edu/enviro/Photos_files/Photos.htm
Great Lakes Photo Gallery: http://www.epa.gov/glnpo/image/
Earth and Space Gallery: http://spacelist.org/data.shtml\
The Online Zoo: Over 6,000 animal images http://www.theonlinezoo.com/
Earth Images: Images of our changing planet. http://www.usgcrp.gov/usgcrp/links/images.htm
NLIB: National Library of Images from the Environment http://life.nbii.gov/dml/home.do
Pics 4 Learning: A gallery of just about anything for educators and students. http://pics.tech4learning.com/
A compilation of the above listed sites. TONS of links to sites with images to be used in classrooms or projects. http://www.internet4classrooms.com/links_grades_kindergarten_12/photos_graphics.htm