The major task before delegates is the question of “ambition.” Will countries raise their “nationally determined contributions”(NDCs) above what they offered in Paris? The deadline for doing so is next year (2020), but ambitious countries have already been committing to raise their targets or even put forward new ones, and many will seek to use COP25 (and another UN summit in September) to press all countries to step up their efforts. In addition to NDCs, countries are also invited to present Long-term Strategies (LTSs) which are indicative pathways for emission reductions through 2050. Will these new commitments be enough to put the world on an emissions pathway compatible with 2C or 1.5C?