What is Environmental Science? Student Guide

Environmental Science is the study of the natural world and the complex relationship between humans and the environment. It brings together biology, chemistry, geography, physics, and social science to explore how ecosystems function — and how human activity is shaping the planet.

At its core, Environmental Science is about understanding systems. It examines how air, water, land, and living organisms interact, and how changes in one part of the system can affect everything else. From rising global temperatures to ocean pollution and biodiversity loss, it provides the tools to analyse some of the most urgent challenges facing the world today.

This subject goes beyond observation. It is about action, solutions, and responsibility. Environmental scientists ask not only what is happening to the planet, but why — and what can be done to protect it. Whether studying climate patterns, ecosystems, or sustainable technologies, students learn to interpret data, evaluate evidence, and think critically about long-term global impact.

For students, Environmental Science offers a powerful combination of scientific understanding and real-world relevance. It appeals to those who are curious about nature, concerned about global issues, and motivated to make a meaningful difference.

In this guide, we’ll explore what Environmental Science involves, why it matters, the key topics you’ll study, how it’s applied in the real world, influential figures in the field, future career pathways, and how you can explore it with Oxford Summer Courses.

Why Study Environmental Science?

Environmental Science is one of the most relevant and forward-looking subjects you can study today. It equips you with the knowledge and perspective needed to understand global change — and to respond to it.

It helps you understand the world we live in

From extreme weather to rising sea levels, environmental issues are constantly in the news. Environmental Science gives you the tools to understand the science behind these events — moving beyond headlines to evidence-based thinking.

You’ll explore how climate systems function, how ecosystems maintain balance, and how human activity influences natural processes. This deeper understanding allows you to interpret global challenges with clarity and confidence.

It brings together multiple disciplines

Environmental Science is inherently interdisciplinary. It combines elements of:

• Biology (living organisms and ecosystems)
• Chemistry (pollution, atmospheric reactions, water quality)
• Geography (land use, climate patterns)
• Physics (energy systems and environmental processes)
• Economics and policy (resource management and sustainability)

This broad approach helps you see connections between systems — and understand why solutions must also be interconnected.

It prepares you to make a real impact

Few subjects are as directly linked to global change as Environmental Science. Whether you’re interested in science, policy, education, or business, this field gives you the knowledge to contribute to meaningful solutions.

From reducing carbon emissions to protecting biodiversity, Environmental Science empowers you to think about how your actions — and future career — can make a difference.

It builds critical and analytical thinking

Environmental challenges are complex. They involve data, uncertainty, competing priorities, and long-term consequences.

Studying Environmental Science helps you develop:

• Data analysis skills
• Scientific reasoning
• Problem-solving ability
• Clear communication of complex ideas

These are highly transferable skills, valued across academic disciplines and professional sectors.

What Do You Study in Environmental Science?

Environmental Science covers a wide range of topics, all connected by the idea of understanding and protecting natural systems.

1. Climate Systems and Global Warming

You’ll explore how Earth’s climate works and why it is changing.

This includes studying the greenhouse effect, carbon cycles, atmospheric composition, and the scientific evidence behind rising global temperatures. You’ll also examine the causes and consequences of climate change, from melting ice caps to extreme weather events.

This area is central to the subject because climate change influences nearly every environmental system.

2. Ecosystems and Biodiversity

Ecosystems are networks of living organisms interacting with their environment.

You’ll study food chains, energy flow, ecological balance, and how species depend on one another. You’ll also explore biodiversity — the variety of life on Earth — and why it is essential for ecosystem stability.

This topic highlights the importance of protecting habitats and understanding the consequences of human disruption.

3. Pollution and Waste Management

Pollution is one of the most visible environmental challenges.

You’ll examine different types of pollution, including air, water, and soil contamination. You’ll also explore how pollutants are produced, how they spread, and their impact on human health and ecosystems.

Importantly, you’ll study solutions — such as waste reduction, recycling systems, and sustainable treatment methods.

4. Renewable Energy and Sustainability

As the world moves away from fossil fuels, renewable energy becomes increasingly important.

You’ll explore energy sources such as solar, wind, hydro, and biofuels, and evaluate their advantages and limitations. You’ll also examine how sustainable practices can reduce environmental impact and support long-term resource management.

This area connects science with innovation and future-focused thinking.

5. Human Impact and Urbanisation

Human activity has a significant influence on the environment.

You’ll study how agriculture, deforestation, industrialisation, and urban growth affect ecosystems. You’ll also explore population dynamics, land use, and the challenges of creating sustainable cities.

This topic encourages you to think about how development can balance economic growth with environmental responsibility.

6. Conservation and Environmental Policy

Environmental protection often depends on effective policy and cooperation.

You’ll examine how governments, organisations, and communities work to conserve natural resources and protect ecosystems. This includes studying environmental laws, international agreements, and conservation strategies.

This area highlights the role of science in shaping real-world decisions.

Real-World Applications of Environmental Science

Environmental Science plays a crucial role in addressing global challenges and shaping a sustainable future.

Climate Change Mitigation

Scientists and policymakers use environmental data to develop strategies for reducing carbon emissions and slowing global warming.

This includes renewable energy adoption, carbon reduction targets, and international climate agreements — all grounded in scientific research.

Conservation and Wildlife Protection

Environmental scientists work to protect endangered species and restore ecosystems.

This may involve tracking animal populations, managing protected areas, or designing conservation programmes that support biodiversity and ecological balance.

Air and Water Quality Monitoring

Monitoring environmental quality is essential for public health.

Scientists analyse air pollution, water contamination, and chemical exposure to ensure safe living conditions and prevent environmental hazards.

Sustainable Farming and Food Systems

Environmental Science supports agriculture that is both productive and sustainable.

This includes techniques like crop rotation, soil conservation, and reduced pesticide use — helping to maintain food supply while protecting ecosystems.

Environmental Education and Advocacy

Raising awareness is key to driving change.

Environmental scientists, educators, and communicators share knowledge through campaigns, media, and education programmes — encouraging individuals and communities to adopt more sustainable behaviours.

Green Technology and Innovation

Environmental challenges often require technological solutions.

Scientists work with engineers to develop innovations such as carbon capture systems, biodegradable materials, and energy-efficient infrastructure — combining science with creativity to build a more sustainable world.

Famous Figures in Environmental Science

Rachel Carson

Author of Silent Spring, Carson exposed the environmental damage caused by pesticides and helped spark the modern environmental movement.

David Attenborough

Through landmark documentaries, Attenborough has brought the natural world into homes worldwide, raising awareness about biodiversity and climate change.

Wangari Maathai

Founder of the Green Belt Movement, Maathai linked environmental conservation with social justice and community empowerment.

Greta Thunberg

A global climate activist who has mobilised millions, Greta has brought urgency and visibility to climate action.

James Lovelock

Creator of the Gaia hypothesis, Lovelock proposed that Earth functions as a self-regulating system — a concept that reshaped environmental thinking.

What Careers Can You Pursue with Environmental Science?

Environmental Science opens the door to a wide range of impactful and future-focused careers.

Environmental Scientist or Ecologist

Study ecosystems, monitor environmental health, and provide data to guide conservation efforts.

Climate Policy Advisor

Work with governments or organisations to develop strategies that address climate change and sustainability.

Sustainability Consultant

Help businesses reduce environmental impact and adopt more sustainable practices.

Environmental Engineer

Design systems to manage pollution, improve water quality, and reduce emissions.

Wildlife Conservationist

Protect species and habitats through research, fieldwork, and conservation planning.

Environmental Educator or Communicator

Inspire others through teaching, campaigns, or media, promoting awareness and action.

Marine Biologist

Study ocean ecosystems and work to protect marine biodiversity.

Environmental Lawyer

Specialise in environmental law, advocating for regulation, conservation, and sustainability.

Explore Environmental Science at Oxford Summer Courses

At Oxford Summer Courses, Environmental Science programmes are designed to inspire curiosity, critical thinking, and a deeper understanding of the natural world.

Courses are available for students aged 13–24 in both Oxford and Cambridge, taught in small, discussion-based groups by expert tutors.

What makes the experience distinctive?

Small group learning
Engage in meaningful discussion, ask questions, and explore ideas in depth.

Expert tutors
Learn from specialists who guide your thinking and encourage independent exploration.

No fixed curriculum
Your course is shaped around your interests — whether that’s climate change, conservation, or sustainability.

Real-world focus
Explore case studies and current challenges, connecting theory with practice.

Inspiring academic setting
Study in world-renowned university cities, surrounded by history, research, and innovation.

Available Courses

Oxford:

• Environmental Science in Oxford (Ages 13–15)
• Environmental Science in Oxford (Ages 16–17)
• Environmental Science in Oxford (Ages 18–24)

Cambridge:

• Environmental Science in Cambridge (Ages 18–24)

Is Environmental Science Right for You?

Environmental Science could be the perfect subject if you:

• Care about nature and the future of the planet
• Enjoy science and understanding how systems work
• Are curious about climate change and sustainability
• Want to make a meaningful impact through your studies or career
• Like solving real-world problems with data and evidence

It is a subject for students who are both analytical and forward-thinking — those who want to understand the world and help shape its future.

Conclusion

Environmental Science is more than a subject — it’s a way of understanding the world and your place within it.

It connects scientific knowledge with global challenges, helping you explore climate systems, ecosystems, sustainability, and human impact. It develops your ability to think critically, analyse complex issues, and contribute to meaningful solutions.

If you’re passionate about protecting the planet and want to turn that passion into knowledge and action, Environmental Science offers a powerful and rewarding path.

To secure your preferred location, we highly recommend applying early. Each of our Environmental Science courses has a limited number of places available and they tend to fill quickly.

Submit your application today to ensure you don’t miss the opportunity to study Environmental Science in Oxford or Cambridge. Apply now.