hard to fault him based on on fossil fuels

It's not at all hard. He's only green for government subsidies.

Falcon 9: Uses refined kerosene (RP-1) and liquid oxygen (LOX). Each launch burns about 112 tons of kerosene and releases roughly 336 tons of CO₂.

Starship & Super Heavy: Uses liquid methane (CH₄) and liquid oxygen (LOX) in its Raptor engines. A full launch emits around 3,500 to 76,000 metric tons of CO₂.

xAI has installed 59 natural gas turbines for its Colossus 2 data center generating between 6.4 million and 8 million tons of CO2 equivalent emissions per year if operated full-time