Most 20th century international debate on climate change focused almost entirely on mitigation. It was sometimes considered defeatist to pay much attention to adaptation. Also, compared to mitigation, adaptation is more a local matter, with different parts of the world facing vastly different threats and opportunities from climate change. By the early 21st century, while mitigation still receives most attention in political debates, it is no longer the sole focus. Some degree of adaptation is now widely considered essential, and is discussed internationally at least at high level, though which specific actions to take remain mostly a local matter. A commitment to provide $100 billion per year worth of funding to developing countries had been made at the 2009 Copenhagen Summit. At Paris, it was clarified that allocation of the funding should involve a balanced split between adaptation and mitigation, though , not all funding had been provided, and what had been delivered was going mainly to mitigation projects. By 2019, possibilities for geoengineering were also increasingly being discussed, and were expected to become more prominent in future debates.