Evaluating environmental education and awareness programs serves multiple purposes, including assessing their impact on participants' knowledge and behavior, determining their cost-effectiveness, and identifying areas for improvement.

Experimental design is not typically used in evaluating environmental education and awareness programs due to the difficulty in controlling for all variables that may influence the outcomes.

Formative evaluation is conducted during the program to identify areas for improvement, while summative evaluation is conducted at the end of the program to assess its overall effectiveness.

Evaluating the effectiveness of environmental education and awareness programs can be challenging due to the difficulty in isolating the impact of the program from other factors that may influence participants' knowledge and behavior, the lack of standardized evaluation methods, and the difficulty in obtaining reliable data from participants.

Evaluating environmental education and awareness programs can provide several benefits, including identifying areas for improvement, providing evidence of the program's effectiveness to stakeholders, and justifying the continued funding of the program.

Key indicators for evaluating the effectiveness of environmental education and awareness programs include changes in participants' knowledge and awareness of environmental issues, changes in participants' attitudes and values towards the environment, and changes in participants' behaviors that are related to the environment.

Stakeholders can play an important role in evaluating environmental education and awareness programs by providing input on the development of the evaluation plan, assisting in the collection and analysis of data, and helping to disseminate the findings of the evaluation.

When evaluating environmental education and awareness programs, it is important to consider ethical issues such as the need to protect the privacy of participants, the need to obtain informed consent from participants, and the need to avoid causing harm to participants.

There are a number of resources available to help evaluators of environmental education and awareness programs, including the National Environmental Education Foundation, the North American Association for Environmental Education, and the Environmental Protection Agency.

Trends in the evaluation of environmental education and awareness programs include an increasing focus on using mixed methods research designs, a greater emphasis on evaluating the long-term impacts of programs, and a growing interest in using participatory evaluation methods.