Environmental communication campaigns often rely on a variety of signals to convey their message, depending on their goals, message, and audience. Logos are visual symbols that represent the campaign's name, identity, and values - for example, the WWF logo uses a panda as a symbol of wildlife conservation and biodiversity. Slogans provide a short and catchy phrase that summarizes the campaign's message or purpose - for example, the slogan "Save the planet. It's the only one with chocolate." uses humour to persuade people to care about the environment. Colours are powerful visual cues that can evoke meaning, mood, or emotion - for example, green is often associated with nature, sustainability, and health. Sounds can communicate information, emotion, or urgency - for example, the sound of a siren can signal danger or emergency. Finally, gestures are physical movements or actions that can express intention, emotion, or solidarity - for example, the gesture of raising a fist can signal resistance or protest.