Why Need CC0 Images ?
Firstly, for the definition of "CC0 (Creative Commons Zero) image", please refer to "What Is CC0".
To catch readers' eyes, it's necessary to insert high quality images into articles. To save the time, we might search for these images from the internet.
However, not all images from the internet could be re-used or modified because improper use of images might be illegal. According to different announcement from the author of images, these are possible restrictions:
- not allowed for commercial purposes
- not allowed for modification
- attribution is required
To avoid trouble, the best way is to use CC0 images for your articles, as the authors of CC0 images has given up their copyright to the fullest extent allowed by law. They place their works as completely as possible in the public domain, so that others may freely reuse the works for any purposes, or commercial purposes without restriction under copyright or database law.
You can use all the photos under the CC0 license for any legal purpose. The CC0 license was released by the non-profit organization Creative Commons (CC). It is free for personal and commercial use. You can copy it, further more you can modify and distribute the photos. It is no need asking for permission or setting a link to the source.