These CC0 silos are quite risky to use in a professional context.<p>They often collect images en masse from a bunch of sources without further inspection. If someone uploads a copyrighted image to these sources and marks them CC0, they will end up in these CC0 aggregators. And, if your use of this image is discovered, you will be held liable for the damage caused by your action (well, at least here in Sweden).<p>I would do some research before using these images in a professional context. Look up the photographer and confirm that the image is a work of her&#x2F;him. If this site included proper uploader details, it would make this work easier.