JohnPaul Sleiman
JohnPaul Sleiman

Articles by JohnPaul

Greenland is not just an island. It is a climate system.

But Greenland is not just a place. It is a planetary thermostat. What happens there over the next few decades will shape coastlines, weather patterns, and human migration for centuries. Read More

The hard truth about decarbonization: why half-measures will not save us

This creates a dilemma. If we only mandate what is easy for companies to implement, emissions keep rising. If we pretend everything can be decarbonized quickly, climate policy collapses under its obvious failures. A serious approach has to accept two tenets at once: we need full decarbonization everywhere that it is possible, and  we need honest promises from sectors where it is not. Read More

The value of op-eds: Interpretation, not gospel

Op-eds matter when they are honest about their limitations and point to evidence, rather than replace it. Read More

How to survive talking science with your family this holiday

Are you dreading the moment when your crazy uncle brings up climate change at dinner? You are not alone. Read More

Why this hurricane season felt off

One quiet season for U.S. impacts does not mean climate scientists were wrong. It means that we got lucky. Scientists predicted favorable conditions for intense hurricanes, and we got three Category 5 hurricanes. Read More

A shortcut on climate science is a dead end

Climate policy will always involve cost tradeoffs. However, we should not tilt the scale by ignoring evidence or skipping review. Read More

Keep the spaceflight record: restore funding for SPIF and the RPIF network

Most of the photos you see online are actually mosaics built from many smaller images. Behind each lies a vast record — thousands of data points, mission metadata, camera settings, and decades of notes. These aren’t just pretty pictures; they’re the evidence base for science, showing how far we’ve come in exploring our solar system. Read More

When courts decide science: the University and the cases that could decide our future

By September, UR reported at least twenty terminated federal grants, totaling $9 million in losses. That is not a policy debate — it is stalled research, frozen hiring, and real people caught in the middle. Read More

Do not trust the “life on Mars” headline

NASA’s Perseverance rover found something remarkable on Mars last year, but it's not proof of life, yet. Read More

The EPA’s 2009 Endangerment Finding: Why it exists, how it works, and what we lose if it’s rescinded

The Endangerment Finding let the EPA use tools it already had to manage existing risks. Read More