more than twenty percent of the earth’s oxygen more than twenty percent of the earth’s oxygen Rainforest Foundation The Rainforest Foundation Dostupné online tropical forests. Rainforest Foundation: Commonly Asked Questions Dostupné online Rainforest Foundation 2% of the world’s surface cover less than seven percent 20 percent 20% of our oxygen 1 acre each second Rainforest Foundation cover less than seven percent 1 acre each second 1 acre each second one acre every second 1.2 billion shrinking Rainforest Foundation cover less than seven percent over 100 inches a significantly diminished Amazon Rainforest Foundation 80% of our oxygen provides 20% of the Earth's oxygen 1 acre each second 80% of our oxygen Rainforest Foundation US: Commonly Asked Questions and Facts Rainforest Foundation cover less than seven percent 1 acre each second Tropical forests 1 acre each second Dostupné online 1 acre each second