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