instruction:
In this task, you are given a paragraph, and your job is to generate comma-separated entities present in the given paragraph. Generate entities from a given passage in such a way that (i) they are present in the paragraph, (ii) they are non-duplicate, (iii) they underwent a state change during the process. Avoid creating entities that (i) aren't present in the process paragraph and (ii) aren't significant. 
question:
Adult mushrooms produce spores. Release them into the air by process of sporulation. Spores are carried by the wind. Land in a hospitable growing environment. The spores germinate into the soil. The mushroom starts growing. The adult mushroom produce spores of its own to repeat the process. 
answer:
Adult mushroom ,spores ,mushroom 


question:
Solar panels are made up of two types of silicon. Sun shines on solar panels. Sunlight goes into the top half of the solar panel. Sunlight travels into the bottom half of the solar panel. The "jump" between the two halves can be used to make direct current. A solar "inverter" changes the direct current to alternating current. Alternating current can be used to power things in your house. 
answer:
sunlight ,direct current ,alternating current 


question:
Greenhouse gases are released into the air by human activities. The earth changes energy from the sun into heat. Heat rises from the ground. Greenhouse gas molecules in the atmosphere prevent the heat from going into space. The temperature of the earth increases. The temperature continues to rise and melts the polar ice caps. The temperature rises even faster. 
answer:

greenhouse gas ,air ,earth ,energy from sun ,heat ,greenhouse gas molecules ,polar ice cap