Federal regulators made a key decision on SpaceX's plans to launch its gargantuan Mars rocket, called Starship, into orbit from Texas — saying Monday that, as long as the company complies with 75 "mitigating actions," the rocket launches should clear federal standards for environmental impact. The list of actions includes enlisting a "qualified biologist" to monitor the impact on local wildlife; warning the public ahead of launches about the loud sonic booms and possible dangers; and agreeing to clean up any shrapnel from the launches in "sensitive habitats." The company also has to agree to not launch on major holidays...