GREAT BRITAIN (2000) Wetlands*. Ants*. Solar cells*. Leave in water*. Addressed FDC with cachet and thematic cancel. Scott Nos 1902-5.
AVAILABLE AT $12
UNITED NATIONS (2001) Butterfly*. Goose*. Penguin*. Tomato under glass jar*. Palm tree*. Desalinization plant. Hand planting seedling*. Unadressed FDC with cachet and thematic cancel. Scott Nos 812-5. Climate change.
AVAILABLE AT $10
BELGIUM (1974) Environmental protection. FDC with cachet and thematic cancel. Scott No 865, Yvert No 1700.
AVAILABLE AT $5