Topic Briefs
At 21st Century Weather, our Topic Briefs translate complex scientific research into clear, accessible insights. Each Topic Brief is designed to help decision-makers, industries, and communities understand the science and research that underpins the weather we rely on, and how it’s shifting in response to a changing climate.
Whether you’re looking for insights on the future of our climate after net zero, or want to unpack the impact of new fossil fuel projects on emissions and the climate, our Topic Briefs make complex subjects easy to navigate. Our goal is to ensure that the vital information from our cutting-edge research is accessible to everyone.
2025
Follow the links below to access the latest Topic Briefs produced by 21st Century Weather.
Beyond Net Zero
Reaching net zero – and ultimately net-negative emissions – is essential to limit long-term warming. Even after emissions fall to zero, the climate will continue to change due to the inertia of Earth’s systems. This Topic Brief explores what happens after net zero and why rapid emissions cuts matter. We ask:
- What does it mean to go beyond net zero, and why is it necessary?
- Why do climate impacts continue even after we stop emitting CO₂?
- How will key Earth systems – oceans, ice sheets, sea level, and climate patterns – respond under net zero?
The real impact of individual fossil fuel projects
Every new fossil fuel project, no matter its size, adds directly to global warming. Carbon dioxide remains in the atmosphere for centuries, and the warming effect of each additional tonne is measurable and significant. This Topic Brief explains why the emissions from individual projects matter and how their real-world consequences can be assessed. We ask:
- Why does every additional tonne of CO₂ increase global warming?
- How do the emissions from a single fossil fuel project contribute to long-term climate risks?
- What are the social, environmental, and economic consequences of approving new fossil fuel projects?
