#30DayChartChallenge 2026
30 charts. 30 days. 5 categories. One April.
Every April, the #30DayChartChallenge brings together practitioners from around the world to explore data through daily visualizations — one chart per day, guided by thematic prompts. This is my 2026 edition: 30 analytical charts, built entirely in R with ggplot2, across five categories. Each entry links to the full post with code, data sources, and methodology notes.
Where Does $7 Trillion Go?
Norway Runs on Water. India Runs on Coal.
The Energy Transition Is Uneven
Whose Grid Got Cleaner?
Same Income Group, Very Different Power Systems
A Decade of Divergence in Press Freedom
The Energy Transition Looks Different at Every Scale
The Flu Season Clock
From Survival to Stability
Horror Films Are Lottery Tickets
Different Failure Modes, Different Timelines
Distance from Normal
One Intervention, System-Wide Impact
Global Trade Connects Regions Through a Few Dominant Product Flows
Fossil Dependence Rises Through Middle Income — Then Breaks Down at High Income
The Crime Wave May Have Been Written in 1970
The Holiday-Volatility Paradox
As Child Mortality Falls, Risk Concentrates at Birth
Renewables Became the Cheapest Source of Electricity
Three Signals, One Direction
A Century of Stagnation. Four Decades of Change.
The Uneven Race to Renewables
The Planet Still Breathes
Coal Falls. Renewables Rise.
Most Exoplanets Are Still a Blur
We Know Where We've Been. Where We Go Is a Choice.
Energy Transitions Are Not Smooth
One Future Does Not Exist
When Warmth Stops Looking Exceptional
The Confidence Cascade
Built with R & ggplot2 · Visualized by Steven Ponce · GitHub
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