Bertha von Suttner (1843) - Austrian peace activist and author who was the first woman to be awarded the Nobel Peace Prize.
 

Mahatma Gandhi (1869) - Indian leader who championed non-violence and civil disobedience in the struggle for independence from British rule.
 

Pablo Picasso (1881) - Spanish artist whose works, including "Guernica," powerfully condemned the atrocities of war.
 

Dag Hammarskjöld (1905) - Swedish diplomat and second UN Secretary-General, known for his efforts in peacekeeping and conflict resolution.
 

Rachel Carson (1907) - American marine biologist whose book "Silent Spring" helped launch the global environmental movement.
 

Mother Teresa (1910) - North Macedonian-born Catholic nun and missionary who devoted her life to helping the poor in India.
 

Nelson Mandela (1918) - South African anti-apartheid revolutionary and the first Black president of South Africa.
 

Andrei Sakharov (1921) - Soviet physicist and human rights activist, known for his work on disarmament and reform.
 

Jimmy Carter (1924) - Former U.S. President and Nobel laureate recognized for his humanitarian work and international conflict mediation.
 

David Attenborough (1926) - British broadcaster and natural historian, famous for his documentaries on the natural world.
 

Martin Luther King Jr. (1929) - American civil rights leader who fought for racial equality through non-violent protest.
 

Desmond Tutu (1931) - South African Anglican bishop and anti-apartheid activist who promoted reconciliation.
 

Chief Raoni Metuktire (1932) - Brazilian indigenous leader and environmental activist known for his efforts to protect the Amazon rainforest.
 

Jane Goodall (1934) - British primatologist and environmental advocate, known for her work with chimpanzees.
 

Dalai Lama (Tenzin Gyatso) (1935) - Spiritual leader of Tibetan Buddhism and advocate for peace and compassion.
 

Václav Havel (1936) - Czech playwright and political leader who was instrumental in the peaceful transition from communism in Czechoslovakia.
 

Martti Ahtisaari (1937) - Finnish diplomat and former president, recognized for his role in international peace mediation.

Kofi Annan (1938) - Ghanaian diplomat and former UN Secretary-General, noted for his work in conflict resolution and human rights.
 

Ellen Johnson Sirleaf (1938) - Liberian politician and the first elected female head of state in Africa, awarded the Nobel Peace Prize for her efforts in promoting peace and women’s rights.
 

Gro Harlem Brundtland (1939) - Norwegian politician and environmental advocate, known for her role in developing the concept of sustainable development.
 

John Lennon (1940) - British musician and peace activist, famous for his advocacy for peace, including the song "Imagine."
 

Oscar Arias Sánchez (1940) - Costa Rican politician and Nobel laureate recognized for his efforts in bringing peace to Central America.
 

Wangari Maathai (1940) - Kenyan environmentalist and the first African woman to receive the Nobel Peace Prize, known for founding the Green Belt Movement.
 

Chico Mendes (1944) - Brazilian environmental activist who fought to protect the Amazon rainforest and its communities.
 

Shirin Ebadi (1947) - Iranian lawyer and human rights activist, the first Muslim woman to receive the Nobel Peace Prize.
 

Al Gore (1948) - American environmentalist and former Vice President, awarded the Nobel Peace Prize for his work on climate change.

José Ramos-Horta (1949) - East Timorese politician and Nobel laureate, a key figure in the country’s struggle for independence.
 

Vandana Shiva (1952) - Indian environmental activist and author, known for her work on biodiversity, food sovereignty, and ecofeminism.
 

Anote Tong (1952) - Former President of Kiribati, known for his advocacy on climate change and its impact on low-lying island nations.
 

Rigoberta Menchú (1959) - Guatemalan indigenous rights activist and Nobel laureate, recognized for her work on behalf of indigenous peoples.
 

Leymah Gbowee (1972) - Liberian peace activist who led a women’s movement that helped end the second Liberian civil war.
 

Severn Cullis-Suzuki (1979) - Canadian environmental activist who gained international attention with her speech at the 1992 Earth Summit.
 

Malala Yousafzai (1997) - Pakistani education activist and the youngest-ever Nobel laureate, recognized for her advocacy for girls' education.
 

Greta Thunberg (2003) - Swedish climate activist who inspired a global movement demanding urgent action on climate change.

 Regional peacemaker or environmentalist 

 Local peacemaker or environmentalist 

 Everyday hero: This tree honors the countless unsung heroes—possibly you or someone in your community—who make small, everyday actions that nurture peace and protect the environment, reminding us that everyone can make a meaningful difference.