Climate Change and Health

Climate change becomes irreversible when Earth’s natural systems cross critical thresholds called tipping points. These are moments where the climate shifts into a new state that cannot easily be undone, even if we stop emitting greenhouse gases entirely. The IPCC defines tipping points as “critical thresholds in a system that, when exceeded, can lead to a significant change in the state of the system, often with an understanding that the change is irreversible.”
Here’s what you need to know right now: recent IPCC assessments show these tipping points could be triggered between 1°C and 2°C of warming above …

Climate change is intensifying wildfire behavior through longer fire seasons, hotter temperatures, prolonged droughts, and drier vegetation that ignites more easily and burns more severely. What once defined California’s fire risk from mid-April through October has expanded into a year-round threat, fundamentally altering how communities prepare for and respond to wildfire smoke exposure.
The numbers tell a striking story. California has seen a fivefold increase in annual burned area since 1972, according to NASA research. In 2026 alone, CAL FIRE has already documented 3,838 wildfires across 195,439 acres, with incidents like …

Climate change facts are the measurable, evidence-based data points about Earth’s changing climate that urban planners use to design resilient cities and guide adaptation strategies. These facts include rising global temperatures, increased frequency of extreme weather events, sea-level projections, and shifting precipitation patterns that directly inform how communities build infrastructure, zone land, and prepare for future conditions.
For anyone looking to understand how cities respond to climate realities, the connection between data and design is where science meets action. A coastal planner uses projected sea-level rise …

California leads the nation in solar power and electric vehicles, yet coal-fired plants in distant states still power part of our grid. This contradiction isn’t about hypocrisy. It’s about infrastructure, interstate agreements, and the complex reality of how electricity actually reaches your home.
Coal energy remains one of the world’s largest electricity sources, despite aggressive renewable targets in progressive states. The fuel that powered the Industrial Revolution now accounts for roughly 16% of electricity in the Western grid that serves California, down from over 50% two decades ago. That decline represents…

Picture Earth wrapped in an invisible blanket. This blanket, made of gases like carbon dioxide and methane, keeps our planet warm enough for life to thrive. But here’s the problem: humans have been making this blanket thicker and thicker since we started burning coal, oil, and gas to power our cars, heat our homes, and run our factories. That thicker blanket traps extra heat, causing temperatures to rise around the world. This is climate change, and it’s already affecting weather patterns, ocean levels, and ecosystems in ways that touch every corner of the planet.
You’ve probably noticed extreme weather events …

Climate change isn’t some distant threat appearing in computer models. It’s unfolding right now, reshaping our world through forces we’ve set in motion. Understanding what drives these changes matters because the connection between climate change and health affects every breath we take, every meal we eat, and every community we call home.
The science is clear: human activities have fundamentally altered Earth’s climate system. Burning fossil fuels releases carbon dioxide that traps heat in our …

Every night, artificial light floods the sky above our cities, suburbs, and even rural areas. What most people don’t realize is that this glow isn’t just blocking our view of the stars. It’s fundamentally disrupting ecosystems, throwing off wildlife behavior, and contributing to broader environmental challenges that affect us all.
Light pollution has tripled in some regions since 2000, and in 2026, roughly 80% of the global population lives under light-polluted skies. This isn’t merely an aesthetic problem for astronomers. Artificial light at night interferes with natural cycles that countless species have …