Yes, but the potential of hydro is already maxed out in many countries. According to Wikipedia, Austria produces 55% of its energy using hydro. That's great, but most other countries can't do this. In Germany it generates less than 10%. There is no way to follow the Austrian model.
There are not many options for energy sources that are reliable all year and can provide enough energy to replace fossils. There's also no efficient way to store enough energy to overcome the fluctuation in wind energy. Wind is just not a path to being carbon neutral without having a way to store the energy. It can reduce emissions from fossil fuels when it is available, but it can't replace them.
