Multiple choice How much oxygen does an average 50 year-old tree produce? 1,500 pounds / 680.4 kg (enough for 1 person/year) 6,000 pounds / 2721.6 kg (enough for 4 people/year) 12,000 pounds / 5443.1 kg (enough for 8 people/year) 15,000 pounds / 6803.9 kg (enough for 10 people/year) Reveal answer Fill a bubble to check yourself B Correct answer Explanation A mature tree is estimated to produce enough oxygen to support multiple people annually through photosynthesis.