Editors' Summary: TSCA provides EPA with broad authority to address potential hazards posed by the manufacture, processing, distribution in commerce, use, and disposal of chemical substances and mixtures. In this first of a three-part series, the authors begin a detailed examination of the statute and regulatory program. They review the origins, objectives, and key components of TSCA, and then analyze TSCA's scope -- focusing particularly on definitional issues and exclusions.

Above my desk at work, I keep a button that reads "Save the Ugly Animals Too." It is a reminder that more than just the charismatic megafauna, such as wolves and bald eagles and grizzly bears and whales, are worth conserving. From the standpoint of protecting the web of life, including the ecosystems that benefit us all by providing services such as water purification, flood control, nurseries for our fish and shellfish, and opportunities for outdoor recreation, it is often as important to conserve the lesser known species, the cogs and wheels that drive those ecosystems.

In a recent essay, Katrina Wyman suggests four substantial reforms aimed at improving implementation of the Endangered Species Act (ESA) and furthering species recovery: (1) decoupling listing decisions from permanent species protection;3 (2) requiring the Fish & Wildlife Service (FWS) to implement cost-effective species protection measures;5 (3) prioritizing funding for biological hotspots;6 and (4) establishing additional protected areas.

Katrina Wyman has penned a bold, provocative, and innovative critique of the capability of the Endangered Species Act (ESA or Act) to meet the challenges of an increasingly human-dominated world. Bold because the ESA, perhaps more than any other environmental law, has impassioned champions who disfavor dissent. It is no easy task to critique a law with the truly noble mission to preserve life other than our own, particularly when the law's basic premise is that the mission's success is critically dependent on abundant and altruistic actions by us.

Over the past several years, considerable public and private efforts in this country have been directed at reducing the risk of cancer that human exposure to high levels of radon gas poses. These efforts appear to have succeeded in raising public awareness of radon and in increasing testing for radon. For the most part, however, these efforts have been directed toward homeowners and have not addressed the problem of radon in residential rental properties. Yet, in 1989, nearly 34 million homes—over one-third of all housing units in the country—were rental units.

A more substantive precautionary principle of international law is evolving as new treaties articulate new measures of precaution in different contexts. Although there is considerable controversy over how to articulate or define a precautionary "principle" of law, the goal is to ensure that the mere lack of scientific knowledge about risks cannot justify a failure to take appropriate precautions. Where we have sufficient evidence of risk, we often take precautions, despite a lack of certainty about those risks.

A recent headline on the front page of the Wall Street Journal hailed the opening of the nation's first "butterfly bank." The "deposits" in this unusual bank are conservation credits earned by preserving an important area of habitat for the Quino checkerspot butterfly, an endangered species restricted to California. The bank's intended customers are other landowners who hope to develop other sites where the butterfly occurs. In order to do so, they can buy credits from the private entrepreneur who established the butterfly bank.

The Resource Conservation and Recovery Act (RCRA), the Clean Water Act (CWA), and the Clean Air Act (CAA) represent federal regulatory regimes for protecting the environment. Although each statute initially places administrative responsibility in the hands of the U.S. Environmental Protection Agency (EPA), each encourages states, to varying degrees, to take primary responsibility for implementing the statutory regime.