公益广告已经存在了大约一百年。公益广告能够教育大众，提高群体意识;癌症、戒烟、全球变暖、战争、暴力，这些都是公益广告大书特书的主题。
通过视觉表现来攫取公众的注意力，这是比较常用的表现手段。图像生动直观的表达出一种隐忧，让公众如临其境的感受到：如果再不做点什么，我们的美好的世界将被一点一点的破坏。
公益广告的要点就在于：要有视觉冲击力。要有触目惊心的效果以及图像的整体感，下面就是精选的25张公益广告，在这些案例中，图像能有效的冲击视觉、唤起情绪，而且整体的意象深远。
这些广告，更像是一种呼吁、一种声明。瞧瞧哪一张震慑人心让你过目不忘呢?欢迎评论分享下：)
WWF: Tree
Heart and Stroke Foundation: Future
Salvation Army: Politician
Surfrider Foundation: Plastic Invasion
World for All: Train
Dutch Heart Foundation: QR Bystanders
Amnesty International: Tsunami
Ecuadorian Red Cross: Life Inside Life
Department of State Health Services: Share Air
World for All: Building
WWF Desertification: Elephant
Amnesty International: Pencil
Operation Smile: Charlie Dot
Safe Kids: Football
OndAzul NGO: Sardine
Operation Smile: Sally Monkey
TAC: Confusion, Overpass
Samusocial: Stop the Nightmare
Fight for Peace: Favela
Canadian Journalists for Free Expression: Tara
Pedestrian Council of Australia: Man
Stivoro: Open Road
GirlHub: Amina
Global Warming
Utah Department of Highway Safety: Alcohol Cuffs
Greenpeace: Become David
So Acao Solidarity Movement: Much More than Trees
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