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Ashley Hahn / PlanPhilly

How will climate change affect the Delaware watershed and the region's water supply? That's the "elephant in the atmosphere," as the Academy of Natural Sciences' Roland Wall put it, and part of the focus of a multimillion-dollar research initiative launching this week.

Researchers know that changes in temperature and precipitation will impact the Delaware River and the areas that surround it, but Wall, director of the academy's environmental initiatives, said much less is known about the best approaches to prepare for this and protect the water supply in general.

Five public media stations spanning Pennsylvania have joined forces to form a collaborative reporting center called Keystone Crossroads.

Keystone Crossroads will explore urban decline and solutions in Pennsylvania and examine topics such as aging infrastructure, immigration, local government, neighborhood life, poverty and tax policy. The initiative aims to offer connected, statewide reporting on urban challenges in the Keystone State.