> Kamal Meattle even claims that a handful of large plants are enough to sustain a person without any external input! This is wishful thinking. If you run the

> Kamal Meattle even claims that a handful of large plants are enough to sustain a person without any external input! This is wishful thinking. If you run the numbers, it's clear that to produce enough oxygen for even just one person you need a lot more plants than anyone can reasonably grow inside their homes. You would need 8 lbs of new growth per day to match the amount that a person consumes. > The average adult, when resting, inhales and exhales about 7 or 8 liters of air per minute. That totals about 11,000 liters of air per day. > Inhaled air is about 20-percent oxygen. Exhaled air is about 15-percent oxygen. Therefore, about 5-percent of breathed air is consumed in each breath. That air is converted to carbon dioxide. So, as far as how much air is actually used, human beings take in about 550 liters of pure oxygen per day. https://www.sharecare.com/health/air-quality/oxygen-person-consume-a-day https://www.sharecare.com/health/air-quality/oxygen-person-c... > Plants produce 22 L for every 150 g of growth. They would need to increase in weight by 3.75 Kg (8 pounds), each day, to produce the oxygen used by one person. https://www.gardenmyths.com/houseplants-increase-oxygen-levels/ https://www.gardenmyths.com/houseplants-increase-oxygen-leve...