LÍNGUA INGLESA III
Read the text below about the role of reforestation against global warming.
Reforestation is best against global warming
A group of international scientists revealed that Brazil's forests and the forests of other tropical countries in the Americas are much more durable than those with chainsaws ever dreamed.
In areas abandoned from deforestation and agricultural use, the forest usually bounces back with a vengeance, sucking CO2 (the main gas responsible for global warming) at a rate 11 times greater than that of a forest that hasn't been torn down.
To help in the efforts against climate change, a simple and cheap approach would be to allow the forests to regenerate naturally in degraded areas – and, of course, avoiding further deforestation.
After 20 years of growth, on average, the secondary forests (those that regenerate after deforestation) already achieved the high rates of carbonic gas absorption – 3 tons of carbon per hectare per year.
“Up to now, those forests were kind of orphan, we lived a radical dichotomy between supposed virgin forests and degraded areas. Our work shows that we need to look at this issue more broadly”, says Pedro Brancalion, a University of São Paulo researcher who also backs the study.
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According to the previous text, consider the following statements:
I) the relation between native forest and secondary forest has been clarified by this research group.
II) the recovery of degraded areas could be successfully achieved by letting the forest grow by itself.
III) the absorption of CO2 is necessary in order to keep temperatures regulated in the Americas.
IV) the peak of CO2 absorption is reached within some decades by forest grown in degraded areas.
It is only correct what is stated on: