A 50 ft by 50 ft lawn area produces enough oxygen to support a family of how many for one year?

• A. 2
• B. 4
• C. 6
• D. 8

Answer: (B)

Green plants generate oxygen through photosynthesis, and the amount produced depends on how much leaf area is actively photosynthesizing under daylight. A lawn measuring 50 by 50 feet has a large area of leaves continually photosynthesizing throughout the growing season, so the total oxygen output over a year is substantial. In typical classroom estimates, that amount of green leaf area is considered enough to meet the annual oxygen needs of about a family of four. This is a rough, illustrative figure to show that a common home lawn makes a meaningful contribution to oxygen production. Real-world factors like total sunlight, grass species, mowing height, and overall lawn health will influence the exact amount, but the core idea remains: more green area over time translates to more oxygen produced.