Aloha Mr. Martin!
Wondering about how the earth responded to excess carbon dioxide in the atmosphere in the past? It makes sense to think that a higher amount of carbon dioxide might have encouraged photosynthesis and supported a 'green' planet. What do your scientists say about the increased levels of carbon dioxide today? Will it encourage another green era? Or are there limiting factors in the environment that put the brakes on all that?
warmly, Mrs. P and her students