Apart from the current climate problems, we must consider the life span of our energy resources, which is nearing its end. Beginning today, we must take measures to find the right technologies which will help us get around that situation.
Regarding investment for the development of new technologies, the problem is that there is a market deficiency, or a market failure. Indeed, when a company develops a technology, it does not necessarily recoup its investment. This is the main reason why governments need to intervene. They must correct this market failure by granting, even if it's only on a temporary basis, subsidies to allow these companies to develop the technologies we need.