On June 28 an unmanned SpaceX Falcon 9 rocket exploded polluting the environment with fossil fuels. The rocket contained supplies for the crew of the International Space Station, research equipment, science experiments and an international docking adapter. SpaceX Falcon 9 rocket uses RP-1 oxidized with liquid oxygen. RP-1 is also known as Rocket Propellant-1 or Refined Petroleum-1. Fossil fuels contain sulfur.
Ethanol used to be burned for rockets until more efficient fuels were used that pollute the environment. Ethanol burns a lot cleaner. The first United States satellite was launched using ethanol. The cost to produce biodegradable forms of energy including ethanol could be cheaper without cannabis prohibition. Maybe one day antimatter spacecraft could fly safer without leaving pollution. NASA Administrator Charles Bolden made a statement about the loss of the SpaceX mission.
"We are disappointed in the loss of the latest SpaceX cargo resupply mission to the International Space Station. However, the astronauts are safe aboard the station and have sufficient supplies for the next several months. We will work closely with SpaceX to understand what happened, fix the problem and return to flight. The commercial cargo program was designed to accommodate loss of cargo vehicles. We will continue operation of the station in a safe and effective way as we continue to use it as our test bed for preparing for longer duration missions farther into the solar system."
"SpaceX has demonstrated extraordinary capabilities in its first six cargo resupply missions to the station, and we know they can replicate that success. We will work with and support SpaceX to assess what happened, understand the specifics of the failure and correct it to move forward. This is a reminder that spaceflight is an incredible challenge, but we learn from each success and each setback. Today's launch attempt will not deter us from our ambitious human spaceflight program."