Presidential Decree (PD) 1586: Philippine Environmental Impact Statement System (PEIS)
The law that requires that all agencies and instrumentalities of the national government including government owned and controlled corporations as well as private corporations, firms and entities must prepare an environmental impact statement for every proposed project and undertaking which significantly affect the quality of the environment.
DENR Administrative Order (DAO) 03-30: PEIS Implementation Guidelines and Procedures

Republic Act (RA) 8749: Philippine Clean Air Act (PCAA) of 1999
The law that provides a comprehensive air pollution control policy. Specifically, this legislative intends to apply air quality management in all sources in order to implement abatement and control of air pollution.
DAO 2000-81: PCAA Implementing Rules and Regulations

RA 7586: National Integrated Protected Areas System (NIPAS) Act of 1992
The law that provides a paradigm shift in PA management from the national government agency through the DENR to the local body known as the Protected Area Management Board (PAMB).The PAMB is a multisectoral body chaired by the DENR with representation from the local government units (LGUs), non-governmental organizations (NGOs), people's organizations (POs), indigenous peoples (IPs) through their Council of Elders and national government agencies (NGAs).
DAO 1992-25 NIPAS Implementing Rules and Regulations
PD 705: Philippine Forestry Reform Code
The law that defines the classification, management and utilization of forest lands and resources.

RA 9275: Philippine Clean Water Act of 2004
The law that provides a comprehensive water pollution control policy. Specifically, this legislative intends to apply water quality management in all water bodies in order to implement abatement and control of pollution from land based sources.
DAO 2005-10 PCWA Implementing Rules and Regulations
PD 1067: Water Code of the Philippines

RA 6969: Philippine Toxic Substances and Hazardous and Nuclear Waste Act (PTCHNWA)
This Act mandates the regulation, restriction, or prohibition of the importation, manufacture, processing, sale, distribution, use, and disposal of chemical substances and mixtures that present unreasonable risk and/or injury to health and the environment.
DAO 92-29: PTCHNWA Implementing Rules and Regulations

RA 9003: Philippine Ecological Solid Waste Management Act (PESWMA) of 2000
The law was passed by Congress in December 2000 and signed by the President of the Philippines on January 26, 2001 with the aim of adopting a systematic, comprehensive, and ecological solid waste management program.
DAO 2000- PESWMA Implementing Rules and Regulations