Are We Nearly There Yet?
We review the achievements described in the previous chapters, and note the very many areas in which further work is required. Nevertheless, in the last couple of decades the progress on the chemistry of dust and the chemistry induced by dust has been remarkable. There is general agreement about the chemical and physical nature of interstellar dust, its origin and fate. It is clear that dust grains are chemically active, and there is a general qualitative agreement on the main chemical pathways. The roles of dust chemistry in the formation of stars and planets, at high redshifts as well as in the local Universe, are reasonably well understood. The connection between astrochemistry and astrobiology has been tentatively explored.