
OneEarth
Giving Voice to Your Generation
OneEarth is a youth-driven initiative dedicated to amplifying young voices on today’s most pressing global challenges. By inspiring engagement and supporting the next generation of leaders, OneEarth encourages young people to actively participate in shaping a more sustainable, thoughtful, and inclusive future.
We believe that meaningful change begins when young people are given the opportunity to think critically, collaborate globally, and contribute their ideas to real-world challenges.
Youth Leadership: Empowering Change
- Leadership
Young leaders drive meaningful initiatives and propose impactful solutions. - Empowerment
Engaging youth fosters a culture of responsibility, action, and change. - Collaboration
Working together across borders amplifies youth voices on a global scale.
The Importance of Youth Voices
- Direct Impact
Young people are directly affected by global challenges such as population decline, making their perspectives essential in shaping future-focused solutions. - Unique Insights
Youth bring fresh perspectives that challenge traditional viewpoints and spark innovative approaches to complex problems. - Responsibility & Action
Involving youth in global discussions empowers them to take responsibility and drive change within their communities and beyond.
Youth Action Around the World
- Youth activists advocating for climate justice worldwide.
- Grassroots movements calling for systemic social reform.
- Student-led projects addressing local and regional issues.
- Youth initiatives promoting mental health awareness and support.

OneEarth is a youth-driven initiative dedicated to amplifying young voices on today’s most pressing global challenges. By inspiring engagement and supporting the next generation of leaders, OneEarth encourages young people to actively participate in shaping a more sustainable, thoughtful, and inclusive future.
We believe that meaningful change begins when young people are given the opportunity to think critically, collaborate globally, and contribute their ideas to real-world challenges.
OneEarth
Giving Voice to Your Generation
Youth Leadership: Empowering Change
- Leadership
Young leaders drive meaningful initiatives and propose impactful solutions. - Empowerment
Engaging youth fosters a culture of responsibility, action, and change. - Collaboration
Working together across borders amplifies youth voices on a global scale.
The Importance of Youth Voices
- Direct Impact
Young people are directly affected by global challenges such as population decline, making their perspectives essential in shaping future-focused solutions. - Unique Insights
Youth bring fresh perspectives that challenge traditional viewpoints and spark innovative approaches to complex problems. - Responsibility & Action
Involving youth in global discussions empowers them to take responsibility and drive change within their communities and beyond.
Youth Action Around the World
- Youth activists advocating for climate justice worldwide.
- Grassroots movements calling for systemic social reform.
- Student-led projects addressing local and regional issues.
- Youth initiatives promoting mental health awareness and support.

OneEarth is a youth-driven initiative dedicated to amplifying young voices on today’s most pressing global challenges. By inspiring engagement and supporting the next generation of leaders, OneEarth encourages young people to actively participate in shaping a more sustainable, thoughtful, and inclusive future.
We believe that meaningful change begins when young people are given the opportunity to think critically, collaborate globally, and contribute their ideas to real-world challenges.
OneEarth
Giving Voice to Your Generation
Youth Leadership: Empowering Change
- Leadership
Young leaders drive meaningful initiatives and propose impactful solutions. - Empowerment
Engaging youth fosters a culture of responsibility, action, and change. - Collaboration
Working together across borders amplifies youth voices on a global scale.
The Importance of Youth Voices
- Direct Impact
Young people are directly affected by global challenges such as population decline, making their perspectives essential in shaping future-focused solutions. - Unique Insights
Youth bring fresh perspectives that challenge traditional viewpoints and spark innovative approaches to complex problems. - Responsibility & Action
Involving youth in global discussions empowers them to take responsibility and drive change within their communities and beyond.
Youth Action Around the World
- Youth activists advocating for climate justice worldwide.
- Grassroots movements calling for systemic social reform.
- Student-led projects addressing local and regional issues.
- Youth initiatives promoting mental health awareness and support.
Global Challenge Theme
This year, the OneEarth Global Challenge focuses on population decline, a demographic shift reshaping societies across the world.
Declining birth rates and aging populations are no longer isolated national concerns. They are interconnected global challenges affecting economic systems, labor markets, education structures, healthcare systems, and long-term social sustainability.
For young people, population decline is not simply a statistical trend. It directly influences the future of work, family structures, economic stability, and quality of life.
Through this initiative, OneEarth invites students to explore these issues not just as observers, but as researchers, thinkers, and problem-solvers.
Population Decline & Our Shared Future
Students participating in the OneEarth Global Challenge are organized into six continental teams, each exploring population decline from a regional perspective.
This structure allows participants to understand both regional differences and global patterns of demographic change.
Each team will:
- Review existing academic research and demographic data
- Analyze trends in birth rates, aging populations, and migration
- Identify key social, economic, and cultural challenges
- Propose forward-looking solutions from a youth perspective
Through this comparative approach, students gain a deeper understanding of how local realities connect to broader global issues.
A Global Youth-Led Research Approach
Developing Future Global Leaders
Through participation in the OneEarth Global Challenge, students develop essential skills while engaging with real-world global challenges.
- Cross-Cultural Perspectives
Working with peers from different regions strengthens cultural understanding and global awareness. - Real-World Data Experience
Students gain experience analyzing global datasets and applying research methodologies to complex societal questions. - Communication & Leadership
Presentations, discussions, and collaborative projects help students build confidence, articulate ideas clearly, and develop leadership skills.



- Executive Director
International Union for the
Scientific Study of Population (IUSSP)
DR. MARRY ZUPPAN
- Director of OneEarth
- Associate Professor at UIC Barcelona
- Head of Nursing and Midwifery for the Pediatrics and Maternity Department Hospital General de Granollers
DR. CRISTINA NAQUI

- Distinguished Professor Emeritus of Economics at UC Berkeley
- Center for the Economics and
Demography of Aging (CEDA)
DR. RONALD LEE
Meet our mentors
Global Challenge Theme
This year, the OneEarth Global Challenge focuses on population decline, a demographic shift reshaping societies across the world.
Declining birth rates and aging populations are no longer isolated national concerns. They are interconnected global challenges affecting economic systems, labor markets, education structures, healthcare systems, and long-term social sustainability.
For young people, population decline is not simply a statistical trend. It directly influences the future of work, family structures, economic stability, and quality of life.
Through this initiative, OneEarth invites students to explore these issues not just as observers, but as researchers, thinkers, and problem-solvers.
Population Decline & Our Shared Future

Students participating in the OneEarth Global Challenge are organized into six continental teams, each exploring population decline from a regional perspective.
This structure allows participants to understand both regional differences and global patterns of demographic change.
Each team will:
• Review existing academic research and demographic data
• Analyze trends in birth rates, aging populations, and migration
• Identify key social, economic, and cultural challenges
• Propose forward-looking solutions from a youth perspective
Through this comparative approach, students gain a deeper understanding of how local realities connect to broader global issues.
A Global Youth-Led Research Approach
Developing Future Global Leaders
Through participation in the OneEarth Global Challenge, students develop essential skills while engaging with real-world global challenges.
- Cross-Cultural Perspectives
Working with peers from different regions strengthens cultural understanding and global awareness. - Real-World Data Experience
Students gain experience analyzing global datasets and applying research methodologies to complex societal questions. - Communication & Leadership
Presentations, discussions, and collaborative projects help students build confidence, articulate ideas clearly, and develop leadership skills.



Meet our mentors
- Executive Director of International Union for the Scientific Study of Population (IUSSP)
DR. MARY ZUPPAN
- Associate Director of Center for the Economics and Demography of Aging (CEDA)
- Distinguished Professor Emeritus of Economics at UC Berkeley
DR. RONALD LEE
- Director of OneEarth
- Head of Maternity and Pediatrics, Hospital General de Granollers, Barcelona
- Associate Professor of Nursing & Midwifery UIC Barcelona
DR. CRISTINA NAQUI
Our sponsors







Global Challenge Theme
This year, the OneEarth Global Challenge focuses on population decline, a demographic shift reshaping societies across the world.
Declining birth rates and aging populations are no longer isolated national concerns. They are interconnected global challenges affecting economic systems, labor markets, education structures, healthcare systems, and long-term social sustainability.
For young people, population decline is not simply a statistical trend. It directly influences the future of work, family structures, economic stability, and quality of life.
Through this initiative, OneEarth invites students to explore these issues not just as observers, but as researchers, thinkers, and problem-solvers.
Population Decline & Our Shared Future
Students participating in the OneEarth Global Challenge are organized into six continental teams, each exploring population decline from a regional perspective.
This structure allows participants to understand both regional differences and global patterns of demographic change.
Each team will:
• Review existing academic research and demographic data
• Analyze trends in birth rates, aging populations, and migration
• Identify key social, economic, and cultural challenges
• Propose forward-looking solutions from a youth perspective
Through this comparative approach, students gain a deeper understanding of how local realities connect to broader global issues.
A Global Youth-Led Research Approach
Developing Future Global Leaders
Through participation in the OneEarth Global Challenge, students develop essential skills while engaging with real-world global challenges.
- Cross-Cultural Perspectives
Working with peers from different regions strengthens cultural understanding and global awareness. - Real-World Data Experience
Students gain experience analyzing global datasets and applying research methodologies to complex societal questions. - Communication & Leadership
Presentations, discussions, and collaborative projects help students build confidence, articulate ideas clearly, and develop leadership skills.



Meet our mentors
- Executive Director of International Union for the Scientific Study of Population (IUSSP)
DR. MARY ZUPPAN
- Associate Director of Center for the Economics and Demography of Aging (CEDA)
- Distinguished Professor Emeritus of Economics at UC Berkeley
DR. RONALD LEE
- Director of OneEarth
- Head of Maternity and Pediatrics, Hospital General de Granollers, Barcelona
- Associate Professor of Nursing & Midwifery UIC Barcelona
DR. CRISTINA NAQUI
Our supporters






"The TIRJC conference broadened my horizons with its diverse range of topics and exceptional presentations. The networking opportunities were invaluable, leaving me inspired and ready to enhance my own research endeavors."
Excellent!
AK
Allison K
1st Place Presenter
"Attending the TIRJC conference was an eye-opening experience. The meticulous organization, passionate judges, and high-quality presentations made it an unforgettable event, setting a standard for academic excellence."
Brilliant!
LC
Lia C
Junior at Diamond Bar High School
"The International Research Journal & Conference was a celebration of interdisciplinary learning, showcasing the importance of humanities alongside STEM. As a PhD student, I found it inspiring to see scholars of all levels sharing their insights."
Great!
KP
Keshia P
PhD at Boston University
What our participants say!
"Presenting at the InnovateX symposium was a fantastic opportunity to share innovative research and connect with fellow scholars. Winning third place was a great honor, and I'm grateful for the support from the organizers and judges."
Fantastic!
MK
Mirue K
Freshman at Brandeis University
"As a judge at TIRJC, I was impressed by the confidence and talent of all participants. This event serves as a reminder that opportunities abound for those willing to pursue knowledge and showcase their abilities."
Aamazing!
SP
Dr. Suela P
Judge at TIRJC 2023
"As Chief Director of TIRJC, I'm inspired by the curiosity and inquiry it fosters. From elementary school to PhD levels, we strive to create a platform for interdisciplinary collaboration and scholarly growth. Our vision is to continue evolving, ensuring meaningful knowledge exchange for years to come."
impressive!
MS
Dr. Makoto S
Chief Director of TIRJC 2023

















