Much remains to be done – further reducing emissions by 2030 and 2050 – and the agreement provides the tools to achieve this. Recognizing that many developing countries and small island states that have contributed the least to climate change could suffer the most from its consequences, the Paris Agreement includes a plan for developed countries – and others that are “capable” to do so – to continue to provide financial resources to help developing countries mitigate and increase their resilience to climate change. The agreement builds on the financial commitments of the 2009 Copenhagen Accord, which aimed to increase public and private climate finance for developing countries to $100 billion per year by 2020. The Pact does not set greenhouse gas emission limits for each country and does not include enforcement mechanisms, but rather creates a framework for international negotiations on future agreements or protocols to set binding emission targets. Participating countries meet annually at a Conference of the Parties (COP) to assess their progress and continue discussions on how best to tackle climate change. Carbon dioxide, nitrous oxide and methane are gases that accumulate in the atmosphere and prevent heat from radiating from the Earth`s surface into space, resulting in a greenhouse effect. According to the Intergovernmental Panel on Climate Change (IPCC), the leading international scientific body working on the issue, the concentration of these heat-trapping gases has increased dramatically since pre-industrial times, reaching levels not seen in at least 800,000 years. .