On May 16, 1918, President Woodrow Wilson officially created the White Mountain National Forest, which resides mostly in New Hampshire (with about 5% of the forest in Maine). It’s the only national forest located in either state or the most eastern national forest in the country.
On May 5, 1956, the US Post Office issued the first stamp in a 22-year series calling attention to the importance of wildlife conservation.
On April 29, 1961, the World Wildlife Fund (WWF) was founded. The world’s largest conservation organization, the WWF supports around 3,000 projects in 100 countries.
On April 6, 1999, the USPS issued the first stamp sheet in its 12-year Nature of America series. This popular series featured the first US self-adhesive sheets designed as one large scene.
On August 9, 1854, transcendentalist writer Henry David Thoreau published his most famous work – Walden. It was based on the two years he spent contemplating Transcendentalist philosophy at Walden Pond, Massachusetts.
On June 8, 1906, President Theodore Roosevelt signed the Antiquities Act into law, giving him and future presidents the authority to create national monuments from federal lands.
On May 4, 1974, Expo ’74 opened in Spokane, Washington. “Celebrating Tomorrow’s Fresh New Environment,” it was the first world’s fair to focus on environmental themes.
On March 16, 1934, President Franklin Roosevelt signed the Migratory Bird Hunting Stamp Act, creating America’s popular Duck Stamps.
On February 26, 1919, Woodrow Wilson signed legislation establishing the Grand Canyon National Park. It’s one of the country’s most popular national parks and is considered one of the Wonders of the World.