Pollen

Vacant Lot in Detroit

In Detroit, Plant Growth on Vacant Land Has Created a Pollen Problem

The reforestation of Detroit has become a problem for allergy and asthma sufferers in the area.

August 28, 2019 - Undark Magazine

California Wildflowers

Where, and Why, Allergies Are Worst

Your senses (or lack thereof) aren't deceiving you. Some cities really are worse for seasonal allergies than others, and some of the reasons are entirely preventable.

July 3, 2019 - The Guardian

Melbourne University lawns

An Abundance of Male Trees Is Upping Your Allergy Misery

All that pollen in the air giving you the sneezes is probably because of all the male trees your city has been planting.

March 17, 2017 - Greater Greater Washington

Sneeze Cities

This post from Mother Nature Network lists the 12 cities that are the worst for allergy sufferers.

June 12, 2011 - Mother Nature Network

News from HUD User

HUD's Office of Policy Development and Research

Call for Speakers

Mpact Transit + Community

New Updates on PD&R Edge

HUD's Office of Policy Development and Research

Top Books

An annual review of books related to planning.

Top Websites

The best of the Internet—since 2002.

Top Apps

Planning apps for a brave new world.

Top Schools

The definitive ranking of graduate planning programs.

Urban Design for Planners 1: Software Tools

This six-course series explores essential urban design concepts using open source software and equips planners with the tools they need to participate fully in the urban design process.

Planning for Universal Design

Learn the tools for implementing Universal Design in planning regulations.