Facing Environmental Issues in World's Megacities

Jakarta, Dhaka, Lagos, Mumbai, Tokyo and Mexico City are among the world's megacities that are face major environmental and social challenges.

1 minute read

October 14, 2005, 2:00 PM PDT

By Michael Dudley


"[B]y 2030, more than half of all Asians and Africans will live in urban areas. Latin America and the Caribbean will at that time be 84 percent urban, a level comparable to the U.S. As urban population grows, rural populations will shrink. Asia is projected to lose 26 million rural dwellers between 2000 and 2030.

"Mega-cities suffer from a catalog of environmental ills. A World Health Organization (WHO)/United Nations Environment Programme (UNEP) study found that seven of the citiesâ€"Mexico City, Beijing, Cairo, Jakarta, Los Angeles, Sao Paulo and Moscowâ€"had three or more pollutants that exceeded the WHO health protection guidelines. All 20 of the cities studied by WHO/UNEP had at least one major pollutant that exceeded established health limits."

Friday, October 14, 2005 in E The Environmental Magazine

courses user

As someone new to the planning field, Planetizen has been the perfect host guiding me into planning and our complex modern challenges. Corey D, Transportation Planner

As someone new to the planning field, Planetizen has been the perfect host guiding me into planning and our complex modern challenges.

Corey D, Transportation Planner

Ready to give your planning career a boost?

View of dense apartment buildings on Seattle waterfront with high-rise buildings in background.

Seattle Legalizes Co-Living

A new state law requires all Washington cities to allow co-living facilities in areas zoned for multifamily housing.

December 1, 2024 - Smart Cities Dive

Times Square in New York City empty during the Covid-19 pandemic.

NYC Officials Announce Broadway Pedestrianization Project

Two blocks of the marquee street will become mostly car-free public spaces.

December 1, 2024 - StreetsBlog NYC

Broken, uneven sidewalk being damaged by large tree roots in Los Angeles, California.

The City of Broken Sidewalks

Can Los Angeles fix 4,000 miles of broken sidewalks before the city hosts the 2028 Olympic Games?

December 5, 2024 - Donald Shoup

View from back of classroom of elementary school children at desks with raised hands engaged in class.

Why Some Affordable Housing Managers Are Running Education Programs

Many housing organizations are finding that educational programs are a logical — and valuable — addition to their offerings.

December 9 - Shelterforce Magazine

Anchorage Public Transportation

Anchorage Bus Depot to Reopen

After a four-year closure, a downtown Anchorage transit center will once again provide indoor waiting areas and services for bus travelers.

December 9 - Anchorage Daily News

Tall mature green trees lining a concrete walkway next to a street with multistory apartment buildings on other side and sun filtering through the leaves.

Mapping a Greener Future: Cal Poly Tackles Urban Canopy Challenges

Cal Poly, in partnership with Cal Fire, is leading the development of California’s new Strategic Plan for Urban Forestry, combining advanced data tools and interdisciplinary collaboration to expand tree canopy cover.

December 9 - Cal Poly News