By 2050, 7 out of 10 people will live in megacities, offering the benefits of concentrated living but also some of the biggest public-works challenges in human history.

Megacities are not the future because they thrive on cheap labor and government policies fuel this abuse.

Megacities consume 26,347 PetaJoules, which is 6.7 percent of the global energy use—roughly in line with the percentage of the global population that lives there.

In the world's megacities, or those with more than 10 million people, every dollar invested in planting a tree results in an average return on investment of $2.25, according to a recent study from ...

Where megacities can be expected to grow in the future are in the backwaters of the global economy, in Africa and parts of Asia, where the most rapid population growth and urbanization is taking ...

As the world’s population rapidly moves into urban areas, the world’s largest cities are growing explosively--and almost all that growth is happening in the developing world.

Many urban theorists argue that packing people together is the key to economic growth. A look at the world's densest megacities demonstrates how wrong that is.

A new study shows clean-air regulations have dramatically reduced acid rain in the United States, Europe, Japan and South Korea over the past 30 years, but the opposite is true in fast-growing East ...

Sure, the authors explain, we all look at the megacities first. But if you really want a portrait of how the world’s cities are growing, look at the mid-sized or simply large cities are growing.

As Brazil prepares to host the Rio+20 conference this month, its own rapid urbanization highlights the health and infrastructure challenges of promoting sustainable cities worldwide.

The Symmetry and Chaos of the World's Megacities Architectural photographer Ryan Koopmans spent the past decade shooting hi-res photographs of the world's biggest cities. The results are mind-blowing.

Young people struggling in China's megacities have found a way to fit rent into their dwindling budgets — sharing a bed with a stranger.