Which conservation organization launched the famous tagline 'It's Only Natural' as part of their rebranding effort to emphasize sustainable consumption and nature preservation?

Conservation organizations have created some of the most memorable taglines in marketing history, helping to raise awareness about environmental issues and inspire action. These powerful phrases have become synonymous with their brands and causes. Test your knowledge of these impactful conservation campaigns that have helped protect the natural world!

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World Wildlife Fund (WWF)
The Nature Conservancy
National Audubon Society
Sierra Club