Brian Mast actually said...

I want to talk about black carbon, other environmental effects of rocket launches.

The SpaceX Falcon Heavy rocket burns 400 metric tons of kerosene and emits more carbon dioxide in a few minutes than an average car would in...

I also have a concern that Congress... has prohibited the FAA from regulating the design or operation of launch vehicles.

I intend to soon introduce legislation to do that. NASA can promote commercial space.