Impact of Deforestation on Water Resources in Brazil

The video discusses the alarming reduction in water flow at Iguaçu Falls, attributed to deforestation and climate change. It highlights the role of native vegetation in water retention and the impact of agricultural expansion on water systems. The video also presents research findings and suggests solutions to mitigate the crisis, emphasizing the need for policy changes and sustainable practices.

What has caused the Iguaçu Falls to appear less powerful recently?

• Lack of rain and deforestation

• Pollution in the river

• Construction of a dam

• Increased tourism

How does deforestation contribute to the risk of power outages in Brazil?

• By causing more frequent storms

• By damaging power lines

• By reducing the water flow needed for hydroelectric power

• By increasing the demand for electricity

What percentage of the Cerrado's original vegetation has been lost since 1985?

• 10%

• 33%

• 50%

• 75%

What unique feature of the Cerrado's vegetation helps in water retention?

• High branches

• Ultralong and ramified roots

• Thick leaves

• Short roots

What percentage of the Cerrado's river water is estimated to originate from underground sources?

• 20%

• 50%

• 80%

• 100%

What is a major consequence of replacing native Cerrado vegetation with crops like soy?

• Higher rainfall

• Increased biodiversity

• Improved soil quality

• Reduced water infiltration

What percentage of Brazil's electricity is generated by hydroelectric power?

• 64%

• 50%

• 25%

• 80%

What is the projected increase in irrigated area in Brazil by 2040?

• 25%

• 50%

• 100%

• 76%

Which Brazilian biomes are most affected by deforestation according to the video?

• Caatinga and Pampas

• Cerrado and Mata Atlântica

• Amazon and Pantanal

• Pantanal and Caatinga

What do researchers suggest to mitigate the impact of deforestation on water resources?

• Restore natural vegetation in sensitive areas

• Expand agricultural lands

• Increase urban development

• Build more dams