GreenPeace is another common advertiser with some creative PSAs.

While not as visually compelling as the ads of WWF or others,

some GreenPeace ads like the "School of Trash" shown above state their case with strong creativity.

The Best of the Rest

Some of the most creative eco-conscious advertising has been the work of small, boutique firms or individual designers.

Others have been one-off ads with Earth-related themes for large brands - like the Diesel ad below

portraying the world after global warming has run its course. While the Unicef ad below is a clear standout,

each offer an unique perspective on the cause and effects of climate change, pollution and resource mismanagement.