that aims to boost energy efficiency and green technology. The green-based economic strategy is a comprehensive overhaul of South Korea's economy, utilizing nearly two percent of the national GDP. The greening initiative includes such efforts as a nationwide bike network, solar and wind energy, lowering oil dependent vehicles, backing daylight saving time and extensive usage of environmentally friendly technologies such as LEDs in electronics and lighting. The country – already the world's most wired – plans to build a nationwide next-generation network that will be 10 times faster than broadband facilities, in order to reduce energy usage. The renewable portfolio standard program with renewable energy certificates runs from 2012 to 2022. Quota systems favor large, vertically integrated generators and multinational electric utilities, if only because certificates are generally denominated in units of one megawatt-hour. They are also more difficult to design and implement than a Feed-in tariff. Around 350 residential micro combined heat and power units were installed in 2012. In 2017, South Korea was the world's seventh largest emitter of carbon emissions and the fifth largest emitter per capita. The president Moon Jae-in pledged to reduce greenhouse gas emissions – which contribute to climate change – to zero in 2050. Seoul's tap water recently became safe to drink, with city officials branding it "Arisu" in a bid to convince the public. Efforts have also been made with afforestation projects. Another multibillion-dollar project was the restoration of Cheonggyecheon, a stream running through downtown Seoul that had earlier been paved over by a motorway. One major challenge is air quality, with acid rain, sulfur oxides, and annual yellow dust storms being particular problems. It is acknowledged that many of these difficulties are a result of South Korea's proximity to China, which is a major air polluter. South Korea had a 2019 Forest Landscape Integrity Index mean score of 6.02/10, ranking it 87th globally out of 172 countries. South Korea is a member of the Antarctic-Environmental Protocol, Antarctic Treaty, Biodiversity Treaty, Kyoto Protocol (forming the Environmental Integrity Group (EIG), regarding UNFCCC, with Mexico and Switzerland), Desertification, Endangered Species, Environmental Modification, Hazardous Wastes, Law of the Sea, Marine Dumping, Comprehensive Nuclear-Test-Ban Treaty (not into force), Ozone Layer Protection, Ship Pollution, Tropical Timber 83, Tropical Timber 94, Wetlands, and Whaling. Government The South Korean government's structure is determined by the Constitution of the Republic of Korea. Like many democratic states, South Korea has a