b. What happens to the infrared photons? c. What is the temperature reading? How does the temperature compare to when there was no greenhouse gases in the atmosphere? Step 3: Select the ice age, 1750's, and today tabs and record the changes in greenhouse gases and temperature. Greenhouse Carbon Dioxide Methane Nitrous Oxide Gas Temperature Concentration Concentration (CO2) Concentration (CO4) Concentration (N20) Ice Age 1750 Today a. Have greenhouse gas concentrations increased or decreased since 17507 b. What happens to temperature as greenhouse gas concentration increases? Step 4: Go to GLASS tab. a. Record temperature. b. Add 3 glass panels. Record temperature again. c. What effect do glass panels have on temperature? d. What effect do glass panels have on the infrared photons? e. If glass panels help trap heat, how could they be used to help a farmer keep his plants warm in a cooler climate