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<p>Does John want to be a corn or pea plant? If we were able to put enough plants on Mars, could they produce enough oxygen for us to be able to breathe? Is there a scientific definition of what constitutes a weed? How do purple leaves work? Should I tell my friend she’s been watering a fake plant for seven months? …Hank and John Green have answers!</p><p><br></p><p>If you're in need of dubious advice, email us at hankandjohn@gmail.com.</p><p><br></p><p>Join us for monthly livestreams at patreon.com/dearhankandjohn.</p><p><br></p><p><br></p><p>See Privacy Policy at <a href="https://art19.com/privacy" rel="noopener noreferrer" target="_blank">https://art19.com/privacy</a> and California Privacy Notice at <a href="https://art19.com/privacy#do-not-sell-my-info" rel="noopener noreferrer" target="_blank">https://art19.com/privacy#do-not-sell-my-info</a>.</p>