He can ASK thoughtful questions. He could ask for example, what kinds of things might hinder global warming?
If CO2 is the problem, how have the CO2 levels changed? What were they 50 years ago and what are they now?
How do plants affect CO2? Would more trees help?]
What are the sources of your information about global warming? Keep asking that everytime a fact is pumped out...well, within reason.
Use science and physics to show why CO2 CAN’t be the cause of global warming, how about particulates?
How do rockets, space station launches and air planes affect the atmosphere? How long would it take for the air to cleanse itself if these things were stopped? (About 1 week produces a noticeable difference...think back on when planes were grounded during 911)
If global warming/climate change is man made, why are the other planets in the solar system also experiencing it?
Make sure he can cite sources for his questions in case he’s asked such as the one about the other planets also warming.
Do you think sunspot activity has an effect on climate change? Why or why not? What might those changes be?
If he’s asking questions, it shows interest in the subject, it shows he’s thinking, especially if he learns how to phrase his questions.
Dr. So and so says that the CO2 levels in 1918 were...xyz, and that they are the same today. What other factors might be contributing to climate change?
Climate Change is actually more appropriate because the climate on the earth is always changing, always has! From tropics at the North Poles to ice ages in mid continent, Climate change can’t be disputed. But the causes of it can be many!
That.