Do You Have Any Earth Day Or Conservation Stamps?

These 4 are in my collection:









Edit: The pictures did not show, so here are the links

https://i.(20130207) Not allowed by the Staff.net/b/1699/730/Go-Green-Share-Rides.jpg

https://i.(20130207) Not allowed by the Staff.net/b/1699/735/Go-Green-Let-Nature-Do-the-Work.jpg

https://i.(20130207) Not allowed by the Staff.net/b/1699/736/Go-Green-Recycle-More.jpg

https://i.(20130207) Not allowed by the Staff.net/b/1699/737/Go-Green-Ride-a-Bike.jpg

Edit #2: Trying again a different way.

https://(20130207) Not allowed by the Staff.com/en/stamps/stamp/412561-Go_Green_Share_Rides-Go_Green-United_States_of_America

https://(20130207) Not allowed by the Staff.com/en/stamps/stamp/412566-Go_Green_Let_Nature_Do_the_Work-Go_Green-United_States_of_America

https://(20130207) Not allowed by the Staff.com/en/stamps/stamp/412567-Go_Green_Recycle_More-Go_Green-United_States_of_America

https://(20130207) Not allowed by the Staff.com/en/stamps/stamp/412568-Go_Green_Ride_a_Bike-Go_Green-United_States_of_America

Edit 3: I give up.

Hi Greve, Are these the ones? They're great.

Yugoslavia
Nature Conservation
September 20, 1994
The stamp set depicts Bojana River and Biogradsko Lake.

Mexico
Definitive Issue - Nature Conservation
2005
$1.00 - Lake Conservation
$6.50 - River Conservation

Italy
European Year of Nature Conservation
November 28, 1970
The design illustrates the damage of industrial pollution to the nature.

DDR (Germany)
Nature Conservation Week
April 12, 1957
The stamp set features Carlina acaulis, Lacerta viridis, and Cypripedium calceolus.

Portugal
European Environment Year
March 20, 1987
Environment protection motifs

This computer-vended stamp from Portugal promotes recycling.

Hungary
European Nature Conservation Year
May 9, 1995
The strip of four stamps depicts wildlife (European tree frog, white stork, red squirrel, beetle, blue tit, European hedgehog, butterfly) in their natural habitat.

San Marino
European Year of Nature Conservation
February 10, 1995
The strip of five stamps depict rich wildlife in a marsh.

Italy
EUROPA - Nature Conservation
April 28, 1986
The block of four stamps show drawing of trees in the shape of heart, star, butterfly, and sun.

The Geneva office of the UN issued a strip of four stamps with a beautiful painting showing endangered wildlife from one pole to the other. The painting is so dramatic because it was done in such warm colors. 1993. Today is United Nations Day - a good day to read their new report on climate change. On the 24th of October, 1945, the UN Charter came into effect.

Bosnia and Herzegovina (Croatia)
Day of Planet Earth
April 22, 2006
The design shows sunflower and Earth to symbolize nature conservation.

Croatia
Day of Planet Earth
April 22, 1994
The stamp shows wolf (Canis lupus) with forest in the background.

Mexico
National Conservation Campaign
December 15, 2000
The stamp depicts a painting of West Indian Manatee (Trichechus manatus).