What must Texas create according to the environmental standards established by the EPA?

The correct answer is SIP, which stands for State Implementation Plan. The Environmental Protection Agency (EPA) requires each state to create a SIP to demonstrate how they will achieve and maintain national ambient air quality standards (NAAQS) set by the Clean Air Act.

The SIP outlines the specific measures and strategies a state plans to implement in order to control air pollution and improve air quality. This plan must be approved by the EPA, ensuring that it meets federal standards while taking into account local conditions and requirements.

In contrast, RACT (Reasonably Available Control Technology), BACT (Best Available Control Technology), and MACT (Maximum Achievable Control Technology) are technical standards used for determining emissions limits for specific sources or categories of sources, primarily in the context of regulating existing or new sources of pollution. These terms are related to how individual facilities must operate to comply with the regulations set forth, while the SIP encapsulates the broader strategy for a state's overall air quality management.