Dela Cruz vs. Manila Electric Company (MERALCO)

The right to health is intrinsic in the right to a balanced and healthful ecology and may be invoked in a petition for issuance of a writ of kalikasan, provided that petitioners sufficiently demonstrate the magnitude of environmental damage required under the Rules of Procedure for Environmental Cases; however, the writ will not issue where respondents comply with all applicable environmental laws and the alleged damage lacks the requisite widespread dimension.

In 2001, the Philippine International Air Terminals Co., Inc. (PIATCO), then operator of Ninoy Aquino International Airport Terminal III (NAIA III), applied for electric service with the Manila Electric Company (MERALCO). To fully operate, NAIA III required the construction of a nearby power substation and the installation of transmission lines to carry electricity to the substation. MERALCO determined that the most feasible route for the transmission lines would be through 10th and 11th Streets in Barangay 183, Zone 20, Villamor, Pasay City. Construction of the power substation was completed in 2002. MERALCO commenced excavation works along 10th Street in September 2009, but these were suspended in December 2009 following a cease and desist order issued by the City Engineering Office of Pasay upon complaint of some residents. Meanwhile, the Manila International Airport Authority (MIAA), the new operator of NAIA III, filed a petition for injunction to lift the cease and desist order, which was granted by the Regional Trial Court in July 2010. With the lifting of the cease and desist order, MERALCO resumed installation works and completed the transmission lines in November 2010.

• The Installation Project: MERALCO installed transmission lines carrying 115 kilovolts of electricity to the NAIA III power substation along 10th, 12th, and 27th Streets in Barangay 183, Zone 20, Villamor, Pasay City. The horizontal clearance of the transmission lines was 90 feet (27.432 meters) and the vertical clearance was 105 feet (32.004 meters), exceeding the requirements of the Philippine Electrical Code which mandates at least 2.87 meters horizontal clearance and 22.6 meters vertical clearance.
• Prior Proceedings: Some residents of Barangay 183 filed a Petition for Issuance of a Writ of Prohibitory Injunction before the Regional Trial Court of Pasay on December 4, 2009, claiming that the installation impinged on their right to health. This case was declared moot by Branch 111 on August 31, 2010 after Branch 118 granted MIAA's petition for preliminary mandatory injunction lifting the cease and desist order issued by the City Engineering Office.
• The Kalikasan Petition: Gemma Dela Cruz and other residents of Barangay 183 and adjacent Magallanes Village in Makati City filed a Petition for Issuance of a Writ of Kalikasan before the Court of Appeals on behalf of persons whose constitutional right to a balanced and healthful ecology was allegedly violated by the installation of transmission lines. They claimed that the electromagnetic fields generated by the high-tension wires posed health risks, particularly childhood leukemia, and that the barangay working permit was issued without prior public consultation in violation of the Local Government Code.
• Certifications: The Department of Health certified that the electromagnetic fields generated by MERALCO's transmission lines did not exceed 16.7 mG, well below the 833 mG (83.33 µT) limit prescribed under Administrative Order No. 033-07 for general public exposure. The Bureau of Health Devices and Technology certified that the transmission lines emitted "extremely low frequency" electromagnetic fields within the International Commission on Non-Ionizing Radiation Protection limits.

• Forum Shopping: Petitioners argued that they did not commit forum shopping because the reliefs of prohibitory injunction and writ of kalikasan are different, and Rule 7, Section 17 of the Rules of Procedure for Environmental Cases allows the filing of separate civil, criminal, or administrative actions despite the pendency of an action for issuance of a writ of kalikasan.
• Right to Health: Citing Oposa v. Factoran and Laguna Lake Development Authority v. Court of Appeals, petitioners maintained that the constitutional right to a balanced and healthful ecology is but an offshoot of the right to health, and therefore the writ of kalikasan necessarily covers violations of the right to health.
• Precautionary Principle: Petitioners prayed for the application of the precautionary principle under Rule 20, Section 1 of the Rules of Procedure for Environmental Cases, arguing that despite limitations in methodology preventing determination of the exact causal link between electromagnetic fields and childhood leukemia, the constitutional right to a balanced and healthful ecology should be given the benefit of the doubt.
• Violations of Law: Petitioners claimed that MERALCO violated Section 7.3.1 of the Implementing Rules of the Code on Sanitation (prohibiting high-tension transmission lines from passing overhead or underground of residential areas) and Section 27 of the Local Government Code (requiring prior consultations). They also contested the height and distance requirements, computing that the horizontal clearance should be 87 meters based on The Powerwatch Handbook.

• Lack of Cause of Action: MERALCO argued that the petition failed to state a cause of action because a writ of kalikasan does not cover the right to health, it being an independent and separate constitutional right from the right to a balanced and healthful ecology.
• Forum Shopping: MERALCO contended that petitioners committed forum shopping because the Petition for Writ of Kalikasan and the earlier Petition for Writ of Prohibitory Injunction had identical parties, subject matters, and causes of action.
• Compliance with Laws: MERALCO maintained that it complied with all legal requirements, including the Philippine Electrical Code and DOH Administrative Order No. 033-07. Government agencies certified the installation works as safe for the environment.
• Public Interest: MIAA argued that the construction of NAIA III is imbued with public interest as a government flagship project and the principal gateway to the Philippines, and that stopping the installation works would constrict aviation and tourism growth.
• Validity of Permits: Punong Barangay Toledanes argued that the working permit was validly issued under Section 389 of the Local Government Code, which grants the punong barangay authority to issue such permits even without prior ratification by the sangguniang barangay. They denied the lack of prior consultations, citing meeting notices and attendance sheets, including attendance by one of the petitioners.
• Widespread Dimension: Respondents argued that the writ of kalikasan requires a threat of "widespread dimension of destruction" affecting inhabitants of two or more cities or provinces, which was not satisfied as the alleged damage was limited to a narrow strip between two adjacent barangays.

• Forum Shopping: Whether petitioners committed forum shopping by filing the Petition for Issuance of a Writ of Kalikasan despite the earlier Petition for Issuance of a Writ of Prohibitory Injunction.
• Availability of Writ of Kalikasan: Whether the installation of transmission lines in Barangay 183 violated petitioners' right to a balanced and healthful ecology, entitling them to any of the reliefs granted under a writ of kalikasan.
• Precautionary Principle: Whether the precautionary principle applies in this case.

• Forum Shopping: Forum shopping was not established because there was no identity of parties between the earlier prohibitory injunction case and the present kalikasan petition; substantial identity requires community of interest, which cannot be assumed merely because some parties share a common barangay. While Rule 7, Section 17 allows separate actions, it does not condone forum shopping, and Section 2(e) still requires a certification against forum shopping.
• Right to Health and Ecology: The right to health is intrinsic in the right to a balanced and healthful ecology, following Oposa and Laguna Lake, and may be invoked in a writ of kalikasan. However, petitioners satisfied only the first of three requisites for the issuance of the writ.
• Unlawful Act: No unlawful act or omission was proved because MERALCO complied with the Philippine Electrical Code and DOH Administrative Order No. 033-07, which amended Section 7.3.1 of the Implementing Rules of the Code on Sanitation. The transmission lines exceeded required clearances and emitted electromagnetic fields within safety limits. The alleged lack of prior consultation under the Local Government Code is not covered by the writ of kalikasan as it is not reasonably connected to environmental damage but rather to local autonomy.
• Magnitude of Damage: The third requisite—that the environmental damage be of such magnitude as to prejudice inhabitants in two or more cities or provinces—was not satisfied. The alleged damage was neither potentially exponential nor large-scale, being limited to a narrow strip between two adjacent barangays, and thus did not constitute the "widespread dimension of destruction" required for the extraordinary remedy.
• Precautionary Principle: The precautionary principle does not apply where regulatory precautions have already been taken. The Philippines adopts the "weak version" of the principle, which means lack of decisive evidence of harm should not be a ground for refusing to regulate, but does not require regulation whenever there is a possible risk. Since the DOH had already set reference levels for electromagnetic field exposure and MERALCO complied with these standards, the principle has no application.

• Intrinsic Right to Health in Ecology: The right to health under Article II, Section 15 of the Constitution is intrinsic in the right to a balanced and healthful ecology under Article II, Section 16, and may be invoked in a petition for a writ of kalikasan.
• Requisites for Writ of Kalikasan: Three requisites must be satisfied for the issuance of the writ: (1) actual or threatened violation of the constitutional right to a balanced and healthful ecology; (2) the violation arises from an unlawful act or omission of a public official, employee, or private individual or entity; and (3) the violation involves or leads to environmental damage of such magnitude as to prejudice the life, health, or property of inhabitants in two or more cities or provinces.
• Magnitude of Environmental Damage: The magnitude of environmental damage is the condition sine qua non for the issuance of a writ of kalikasan. The damage must be potentially exponential in nature and large-scale, transcending political and territorial boundaries.
• Precautionary Principle (Weak Version): The precautionary principle under Rule 20 of the Rules of Procedure for Environmental Cases adopts the "weak version," meaning that lack of full scientific certainty should not be a ground for refusing to regulate, but it does not require prohibiting potentially hazardous activities until they are shown to be safe. The principle does not apply where regulatory precautions have already been taken or where the causal link is relatively certain.

• "Intrinsic in the right to a balanced and healthful ecology is the right to health. Therefore, the right to health may be invoked in a petition for issuance of a writ of kalikasan so long as the magnitude of environmental damage is sufficiently demonstrated."
• "The magnitude of environmental damage is the condition sine qua non for the issuance of a [w]rit of [k]alikasan."
• "The precautionary principle does not apply precisely because regulatory precautions have already been taken."
• "In other words, a petition for the issuance of a writ of kalikasan may be brought if actual or threatened violation to the right to health may be proved."

• Oposa v. Factoran, 296 Phil. 694 (1993): Established that the rights to health and to a balanced and healthful ecology are "united" and actionable in and of themselves; followed.
• Laguna Lake Development Authority v. Court of Appeals, 301 Phil. 299 (1994): Described the rights to health and balanced ecology as "in consonance"; followed.
• Abogado v. Department of Environment and Natural Resources, G.R. No. 246209, September 3, 2019: Highlighted that a writ of kalikasan covers environmental damages the magnitude of which transcends political and territorial boundaries; followed.
• LNL Archipelago Minerals, Inc. v. Agham Party List, 784 Phil. 456 (2016): Enumerated the three requisites for the issuance of a writ of kalikasan; followed.
• Mosqueda v. Pilipino Banana Growers & Exporters Association, Inc., 793 Phil. 17 (2016): Held that the precautionary principle is a principle of last resort with no application where the threat is relatively certain or the causal link can be established; followed.
• Asia United Bank v. Goodland Company, Inc., 660 Phil. 504 (2011): Defined forum shopping as repetitively availing oneself of several judicial remedies in different courts based on the same transactions and essential facts; followed.

• Article II, Section 15, 1987 Constitution: The State shall protect and promote the right to health of the people; applied as intrinsic to the right to a balanced and healthful ecology.
• Article II, Section 16, 1987 Constitution: The State shall protect and advance the right of the people to a balanced and healthful ecology; applied as the primary right protected by the writ of kalikasan.
• Rules of Procedure for Environmental Cases, Rule 7, Section 1: Defines the nature of the writ of kalikasan as a remedy for environmental damage of such magnitude as to prejudice life, health, or property in two or more cities or provinces; applied to determine the scope of the remedy.
• Rules of Procedure for Environmental Cases, Rule 20: Provides for the applicability of the precautionary principle when there is lack of full scientific certainty in establishing a causal link between human activity and environmental effect; applied to reject petitioners' argument where regulatory precautions already existed.
• Department of Health Administrative Order No. 033-07: Sets reference levels for general public exposure to time-varying electric and magnetic fields (83.33 µT or 833.33 mG); applied to determine compliance and negate unlawful act.

Peralta, C.J., Perlas-Bernabe, Caguioa, Gesmundo, Hernando, Carandang, M. Lopez, Delos Santos, Gaerlan, and Rosario, JJ.
Lazaro-Javier, Inting, and Zalameda, JJ., on official leave but voted.