Task: Question Generation
Input (English): Background Paragraph: Greenhouse Effect: The solar energy reaching the surface of the Earth is concentrated in short wavelengths, which can easily penetrate the greenhouse gases, such as carbon dioxide and methane. The Earth, however, is cooler than the sun and it radiates its heat in the form of energy in the far infrared range. These longer wavelengths are partially absorbed by the greenhouse gases and some of the solar heat is returned to Earth. At a certain temperature these processes are in equilibrium and the surface temperature of the Earth is stable. However, if more greenhouse gases are put in the atmosphere the amount of trapped terrestrial radiation increases, leading to an increase in global temperature. 
Story: Two new planets have just been discovered in our solar system. Scientists have just landed on both and are in the process of analyzing the environment and atmosphere of each planet. What is immediately apparent is that both planets are remarkably similar to Earth since both are oxygen rich and do not require a space suit to breathe. Another similarity that one of the planets, Jarthrow, has with Earth is that it naturally outputs approximately the same amount of greenhouse gases into the atmosphere as Earth does. The other planet, Millhouse, outputs about twice as many greenhouse gases. Climate scientists are rushing to try to see if anything new can be discovered to help out our planet with these new discoveries.
Output (English): Which of the two newly discovered planets has less carbon dioxide in its atomsphere?