Legislation would certainly require political will, which we don't have now for tackling anything on such a time scale. To tackle the problem through laws and government enforcement, it would have to become politically tenable at some point, but how would we go from where we are now to something that is closer to this? It's difficult to say with any confidence. But I do know politicians are still human, influenced by their biases and beliefs inherited through biology and life experiences. If our future politicians are to grow up in an environment in which a larger (than today) proportion of people care about problems on a longer time scale, they are more likely to care as well. Consequently, a larger proportion of individuals getting into politics will care about these types of problems, increasing the likelihood of them being addressed.

In parallel but as a separate point, fewer people will be willing to use products or services provided by organizations that they believe are doing wrong or harm by contributing to such problems, thus making it less profitable within capitalism. We already see this to some degree today (Harry Potter comes to mind). Even if the reduction in customers and profit is small, it would decrease compounding and ever so slightly disincentivize the company from making such a pursuit.

It's impressive how adaptive humans are, I must admit. We are quite good at tackling problems we see right in front of us if we set our minds to it. But that doesn't mean we should dismiss problems that are not causing an issue right here and now. We shouldn't wait until it becomes an actual problem because there could be irreversible consequences (or rather, we cannot reverse on reasonable timescale).