Green coronavirus under a microscope. Original image sourced from US Government department: Public Health Image Library, Centers for Disease Control and Prevention. Under US law this image is copyright free, please credit the government department whenever you can”.
Free microphone image, public domain entertainment CC0 photo.
Social Media Mix 3D Icons | Foto: howtostartablogonline.net | via Flickr.com
Nuclear power plant. Free public domain CC0 photo.
