Lisa P. Jackson, administrator of the Environmental Protection Agency, said that a tougher law was "long overdue" and that industry must cover some costs of the new plan. She added that she would pursue regulation of six high-priority chemical groups this fall under the existing law. These include phthalates, which are used to make plastics flexible; bisphenol A, found in the linings of certain food cans and plastics; and perfluorinated compounds, which are used to make nonstick cookware.