with all the options of alternative energy, what are the main reasons we still rely on fossil fuels Instead of more sustainable forms of energy? Hazardous practices, cost, environmental concerns, availability?

The "green revolution" is not developed enough for the US and many other countries to support it.

Explanation:

Asides from energy storage, certain countries can exploit the natural resources in order to improve their economic output. Think of it this way: if you are a developing country, coal mines/power plants can create thousands of jobs as opposed to solar panels, which require specialized labor. In countries like the US, lobbying and political interests have actually slowed down the progress for green transitions. However, we will get there.

Also note that we are not bring coal at the same rate we were a couple uears back. More efficient cars and methods of manufacturing have decreased the overall pollution.