Four group said Thursday the country's biggest drillers aren't disclosing enough of the possible risks they face using hydraulic fracturing and the efforts they are making to reduce those risks. The groups, in a joint survey, graded 24 companies on 32 measures. The companies include Fort Worth-based Range Resources and Irving-based Exxon Mobil. The groups sponsoring the study are As You Sow, Boston Common Asset Management, Green Century, and the Investor Environmental Health Network. Bloomberg News has a report here. A link to the groups' website and a way to download the survey is here.
-- Jim Fuquay