The National Capital Region or Metropolitan Manila, has a unique environmental setting compared to other regions of the country. Instead of lush green vegetation, one sees a black and gray jungle of buildings, thoroughfares and other infra structures. One of the major urban centers in Southeast Asia, Metro Manila is acknowledged as the premiere gateway to the Philippines and the only  region in the country that is entirely urban. It is considered the center for summoning dynamic urban values and unifying rural values. The seat of the national government and  is the political, economic, social, cultural, and educational center of the Philippines.

Metro Manila is the most populous of the twelve (12) defined metropolitan areas in the Philippines and the 11th most populous in the world. As of the 2010 census, it had a population of 11,855,975, comprising 13% of the national population

Thirteen (16) cities, and (1) municipality namely: Municipality of Pateros, Caloocan City, Marikina City, Makati City, Mandaluyong City, Muntinlupa City, City of Manila,  Navotas City, City of Malabon, Valenzuela City, Pasay City, Pasig City, Parañaque City, Quezon City, City of San Juan, Las Piñas City, Taguig City comprise the political structure of  the Metropolitan Manila area. The Region holds the biggest concentration of urban population among the major cities in the Phillippines. Thus, delivery of basic services has become inefficient if not at all ineffective. Transport, housing and refuse collection facilities are the best described as among the most deplorable in this part of the world. To improve the situation, large investment would be needed to generate and apply appropriate technologies that would eventually upgrade the total environment of the metropolis.

a.    Advise The Secretary On Matters Relating To Environmental Management
b.    Formulate Plans And Policies And Set Appropriate Environmental Quality Standards (Water, Air And Noise) For The Prevention, Control Of Pollution And Protection Of The Environment
c.    Issue Permits, Clearances Under  RA 8749, RA 9003, RA 9275, RA 6969 And PD 1586  And Monitor Compliance To Said Laws
d.    Provides Secretariat Support To The Pollution  Adjudication Board Per EO 192
e.    Provides Secretariat Support To The National Solid Waste Management Commission As Provided For In Section 4 of RA 9003
f.    Develop And Implement A Research And Development Program In Support of the following:
– Environmental And Compliance Monitoring; And
– Study Of Existing And Potential Environmental Problems And Issues
g.   Implement A System For The Recognition Of Environmental Laboratories
h. Promote Public Information And Education To Encourage Participation Of An Informed Citizenry In Environmental Quality Planning And Monitoring.
i.    Serve As Focal Point Agency  For International Agreements/Commitments

The EMB is a line Bureau by virtue of Section 34 Of The Philippine Clean Air Act Of 1999 (RA 8749).  The Bureau Is Mandated To Implement on a Nationwide Scale The Six (6) Important Environmental Laws To Wit:

-Environmental Impact Assessment Law (PD 1586)
-Toxic Substances And Hazardous Waste Management Act (RA 6969)
-Clean Air Act Of 1999 (RA 8749)
-Ecological Solid Waste Management Act (RA 9003)
-Clean Water Act (RA 9275)
-Environmental Awareness And Education Act Of 2009  (RA 9512)

Under E.O. 192, EMB is mandated to provide research and laboratory services; and serve as secretariat in the adjudication of pollution cases.

Under EO 320, EMB is designated as the secretariat of the Designated National Authority for CDM of the Kyoto Protocol to the United Nations Framework Convention on Climate Change

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