Tolerance.ca
Director / Editor: Victor Teboul, Ph.D.
Looking inside ourselves and out at the world
Independent and neutral with regard to all political and religious orientations, Tolerance.ca® aims to promote awareness of the major democratic principles on which tolerance is based.

Why Philly has so many sinkholes

By Laura Toran, Professor of Environmental Geology, Temple University
Sinkholes are fairly common in Philadelphia due to aging water lines that leak or burst, causing the surrounding soil to wash away.The Conversation


Read complete article

© The Conversation -
Subscribe to Tolerance.ca


Follow us on ...
Facebook Twitter