Note the current level of atmospheric carbon dioxide. What phrase(s) describe the state of the planet at the most recent previous time that carbon dioxide levels were this high

Spontaneity tell us the direction of the reaction, but not how fast it goes. gibbs free energy brings together enthalpy, entropy and temperature in one easy formula. g = h - ts. and, finally the sign of delta g is always negative for a spontaneous reaction.

Answer trigonal pyramidal;