Task: Question Answering
Input (English): Process:  -People breathe and expel carbon dioxide -Engines produce carbon dioxide -Living things produce waste -Waste decomposes -Decomposition produces methane -Water evaporates -Water vapor joins the atmosphere -Carbon dioxide, water vapor and methane are greenhouse gases -
 Question: What is the effect of isotope has less protons on more carbon dioxide in environment.?
Output (English): none