Ripening a Banana (not in order):
- Put avocados next to a window (sunlight).
- Submerge the avocado in rice; the avocados own gas will ripen it.
- Place avocados near bananas; the gas bananas emit hastens the ripening process.
- Place avocados in a paper bag (doing so along with a banana, apple, Mango, Kiwi, etc. will hasten the process even more).