Most plants aren’t suitable for permanent reduction of Carbon we would need way to much area, alge is however very efficient, some also want to use bacteria, but that may be risky.

And yes, trees are important, but not the best (or if we are honest, Meaningful) way to solve the carbon problem.

Another option would be to make lots of alcohol from plants and store it somewhere permanently. (ethanol is just a very compact carbohydrate)

And further there might be industrial ways to take out carbon on mass permanently, we are just not yet shure.

Anyway, the first priority should be to reduce released of more carbon into the atmosphere.