Pruned

Technologie Alpine de Sécurité creates gas-powered avalanche control systems. The blog Pruned shows pictures of the system installed at Val Thorens, France.

This post from Pruned looks at a proposal to turn a contaminated reservoir into a "bioremediating ecological machine".

A computer model may be able to assist city planners, public safety officials, and researchers in exploring individual pedestrian and crowd behavior in urban spaces.

Hong Kong's unique system of escalators, moving walkways, and pedestrian bridges has transformed the neighborhoods it connects.

Alexander Trevi comments on playground equipment designed to provide local clean water supply in developing countries.