Which modern planning philosophy seeks to address issues like suburban sprawl and environmental deterioration?

New Urbanism is a modern planning philosophy that aims to tackle challenges such as suburban sprawl and environmental degradation by promoting mixed-use development, walkable neighborhoods, and sustainable practices. This approach emphasizes human-scale communities that encourage social interaction, public transportation, and efficient land use, ultimately striving for a more sustainable and livable urban environment.

In contrast, other options like Cite Industrielle primarily focus on industrial planning and architecture without directly addressing suburban sprawl or environmental issues. The Gridiron Street System pertains more to a specific urban layout rather than addressing broader social or environmental concerns. The Garden City Concept, while it advocates for green spaces and self-contained communities, does not address the complexities of modern urban sprawl to the same extent as New Urbanism. Therefore, New Urbanism stands out as the philosophy that directly confronts current urban challenges.