Some economic projections say that greenhouse gas limits will cause economic pain, while others predict economic gain. Why the big difference? It depends on the assumptions you choose–and now you can choose your own.

As part of World Water Day, The Access Initiative (TAI) is releasing a case study of how in 2004, poor data dissemination put the citizens of the capital of the world’s richest country at risk from lead in their drinking water.

For roughly thirty years, Mexico City has been a city in rapid decline, threatening to descend into a murky stew of crime, pollution, and chaos. But in recent years the city has regained its footing, experiencing an urban renaissance powered by a series of projects that have dramatically improved the quality of life of the 18 million people that make the city their home.

The U.S. Congress is debating national legislation to reduce greenhouse gas emissions. For a program like cap-and-trade to work, it must rely on a robust national greenhouse gas registry. What is a registry and what should one look like?

In many developing countries, forestry policies systematically exclude the poor from the wealth of the forests around them. Senegal provides an interesting example of how even good policies can fail to deliver the benefits they are intended to provide.

The rooftop at 10 G Street is about to get a lot greener—3,000 square feet to be exact. In real estate-scarce cities, commercial property owners nationwide are turning roof space into green space.

Climate change may dominate headlines today. Ecosystem degradation will do so tomorrow. Why should business care? Because ecosystem health goes straight to the bottom line.

Where do the interests of environmental protection and the base of the economic pyramid coincide–and where do they clash?

Man-made flood-control systems—such as levees, upstream dams, and canals—continue to be responsible for widespread damage to the New Orleans and Louisiana landscapes.

Laws alone are not enough to ensure environmental protection. Civil society organizations often play a critical role in bringing those laws to life. In Uganda, Greenwatch has done exactly that for the country’s laws on access to environmental information, the first of which passed in 1998.