The goal of the agreement is to reduce the global warming described in Article 2 and improve the implementation of the UNFCCC: Despite Trump`s campaign promises, the White House is under intense pressure to stay in the Paris agreement. Foreign Secretary Rex Tillerson, Energy Secretary Rick Perry, counselor and first daughter Ivanka Trump and her husband, adviser Jared Kushner, support staying in the agreement, but with some adjustments to the emissions target. Large groups such as oil giant Exxon Mobil Corp. have also warned Trump that he will not relinquish the deal. The Paris Agreement is an environmental agreement that was adopted by almost all nations in 2015 to combat climate change and its negative effects. The agreement aims to significantly reduce global greenhouse gas emissions in order to limit global temperature increase to 2 degrees Celsius above pre-industrial levels this century, while continuing to pursue ways to limit the increase to 1.5 degrees. The agreement provides for the commitment of all major emitters to reduce their pollution from climate change and to strengthen these commitments over time. It provides developed countries with a means to assist developing countries in their mitigation and adaptation efforts and establishes a framework for monitoring, reporting and strengthening countries` individual and collective climate goals. Since November 2020, 194 states and the European Union have signed the agreement. 187 countries and the EU, which account for about 79% of global greenhouse gas emissions, have ratified the agreement or have joined the agreement, including China and India, the countries with the first and third largest CO2 emissions among UNFCCC members.    As of November 2020[update], the United States, Iran and Turkey are the only countries with more than 1% not to be contracting parties. Article 28 of the agreement allows the parties to terminate the contract following a notification of an appeal to the custodian. This notification can only take place three years after the agreement for the country comes into force.