Question: Which former American lawyer and Republican politician currently leads the agency that was created for the purpose of protecting human health? 

Context paragraphs:
Rich Vial: Armand Richard Vial (born 1954/55) is an American lawyer and Republican politician currently serving in the Oregon House of Representatives.  He represents the 26th district, which covers parts of southern Washington County and the extreme west of Clackamas County.

Green engineering: Green engineering approaches the design of products and processes by applying financially and technologically feasible processes and products in a manner that simultaneously decreases the amount of pollution that is generated by a source, minimizes exposures to potential hazards (including reducing toxicity and improved uses of matter and energy throughout the life cycle of the product and processes) as well as protecting human health without relinquishing the economic efficiency and viability.  As such, green engineering is not actually an engineering discipline in itself, but an overarching engineering framework for all design disciplines.

United States Environmental Protection Agency: The United States Environmental Protection Agency (EPA or sometimes U.S. EPA) is an agency of the federal government of the United States which was created for the purpose of protecting human health and the environment by writing and enforcing regulations based on laws passed by Congress.  President Richard Nixon proposed the establishment of EPA and it began operation on December 2, 1970, after Nixon signed an executive order.  The order establishing the EPA was ratified by committee hearings in the House and Senate.  The agency is led by its Administrator, who is appointed by the President and approved by Congress.  The current Administrator is Scott Pruitt.  The EPA is not a Cabinet department, but the Administrator is normally given cabinet rank.

Ken Cook: Ken Cook is president and co-founder of the Environmental Working Group (EWG), a non-profit, non-partisan organization dedicated to protecting human health and the environment.  Cook has written dozens of articles, opinion pieces, and reports on environmental, public health, and agricultural topics.  He has been an active lobbyist for over 20 years.

Arkansas Department of Environmental Quality: The Arkansas Department of Environmental Quality (ADEQ or commonly DEQ within the state) is a department of the government of Arkansas under the Governor of Arkansas.  It is responsible for protecting human health and for safeguarding the natural environment: air, water, and land.  ADEQ is responsible for permitting and ensuring compliance with the regulations of the Arkansas Pollution Control and Ecology Commission, which makes environmental policy in Arkansas.

Pakistan Environmental Protection Agency: The Pakistan Environmental Protection Agency (Urdu: ‎ , abbreviated as PEPA), is an executive agency Government of Pakistan managed by the Ministry of Environment.  The agency is charged with protecting human health and the environment by writing and enforcing regulation based on laws passed by Parliament.  The Pak-EPA was proposed by the Prime Minister Nawaz Sharif; it began operations in 1997 after Parliament passed a law to establish a federal executive agency.  The agency is led by an appointed director-general, who is appointed by the Prime Minister on the advice of the Minister for Environment.  The current director-general is Farzana Altaf Shah.  Pak-EPA is not a Cabinet department, but the director-general is normally given the cabinet rank.  Farzana Altaf Shah was recently permoted to the cabinet rank . She is the first female Director General appointed on 17 October 2016.

Scott Pruitt: Edward Scott Pruitt (born May 9, 1968) is an American lawyer and Republican politician from the state of Oklahoma who is currently the fourteenth Administrator of the Environmental Protection Agency (EPA).  Nominated for the position by President Donald Trump, Pruitt was confirmed by the United States Senate to lead the EPA on February 17, 2017.

Oklahoma Department of Environmental Quality: The Oklahoma Department of Environmental Quality (DEQ) is a department of the government of Oklahoma under the Governor of Oklahoma.  It is responsible for protecting human health and for safeguarding the natural environment: air, water, and land.  DEQ is chiefly responsible for the environmental policy of Oklahoma.  It is governed by a thirteen member Environmental Quality Board appointed by the Governor, which in turn appoints an Executive Director to administer the Department.

Ministry of Environment and Physical Planning: The Ministry of Environment and Physical Planning (Macedonian: Министерство за животна средина и просторно планирање ) of the Republic of Macedonia (MoEPP) is a governmental executive authority with its head office on the 10th, 11th, and 12th floors of the MRTV building in Skopje.  It was created for the purpose of protecting human health and the environment by writing and enforcing regulations based on laws passed by the Macedonian Parlament and European Parliament

Indiana Department of Environmental Management: The Indiana Department of Environmental Management (IDEM) is the agency of the U.S. state of Indiana charged with protecting the environment and human health.  There are many offices within IDEM and each has a specific role in environmental protection.  According to the department's website, their mission is "to implement federal and state regulations to protect human health and the environment while allowing the environmentally sound operations of industrial, agricultural, commercial and government activities vital to a prosperous economy"

Supporting paragraphs: United States Environmental Protection Agency Scott Pruitt
Answer: Scott Pruitt