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.

Editors' Summary: It has become regular practice for federal legislators to insert into annual appropriations bills riders having little to do with the appropriations process. Last year, under the sponsorship of the Senate Majority and Minority Leaders, a bill that would have exempted recyclers from CERCLA "arranger" and "transporter" liability was almost enacted as a rider to the omnibus appropriations bill for fiscal year 1999. This Dialogue examines that rider and the changes it would have wrought to CERCLA.

Editors' Summary: One of the most important legal tools in the effort to remediate the nation's contaminated sites is state law that applies to such cleanups. In 1989, the Environmental Law Institute (ELI) conducted a study of this law, and last year, it completed its most recent update of that study. In this Article, two ELI Senior Attorneys discuss the results of that update as it concerns two key aspects of site remediation—voluntary and brownfield cleanup programs.

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.

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.

In Environmental Federalism Part 1: The History of Overfiling Under RCRA, the CWA, and the CAA Prior to Harmon, Smithfield, and CLEAN, the history of judicial and administrative decisions relating to overfiling under the Resource Conservation and Recovery Act (RCRA), the Clean Water Act (CWA), and the Clean Air Act (CAA) was analyzed. The history showed that the U.S. Environmental Protection Agency (EPA), with limited exceptions, generally was understood to have overfiling authority under RCRA, the CWA, and the CAA. The limited exceptions focused on two situations.

Editors' Summary: With their often substantial assets, parent corporations make attractive targets for parties seeking to remedy environmental harm. However, by challenging a court's jurisdiction over the parent, the parent may force a change of forum or, ultimately, a dismissal of the claims. This Article examines the scope of a parent's liabilities for the actions of its subsidiaries and discusses the jurisdictional issues.

What is an appropriate regulatory response to the enormous growth of pesticide use in developing countries? The question falls within the broader issue of how developing countries deal with the consequences of their application of technological packages to agricultural production. As developing countries step up efforts to improve agricultural production, there are rising concerns about the social and economic costs of their agricultural development in terms of the negative health and environmental impact that pesticides are or are likely to cause.