Water Usage in Agriculture and Greenhouses

The video explains how modern greenhouses conserve water and improve crop yields. It highlights the use of rainwater collection, drip irrigation, and UV treatment to reduce water usage by up to 10 times compared to traditional methods. Greenhouses can achieve yields 20 times higher than open fields while using significantly less water, making them a sustainable option for agriculture.

What percentage of the planet's fresh water is used for agriculture?

• 80%

• 70%

• 60%

• 50%

How does a modern greenhouse reduce water usage?

• By using more sunlight

• Through rainwater collection and recycling

• By increasing the temperature

• By using more fertilizers

When was drip irrigation invented?

• 1950s

• 1970s

• 1980s

• 1960s

What is the main advantage of drip irrigation over gravity irrigation?

• It uses more water

• It uses less water

• It requires more labor

• It is less efficient

What does UV treatment remove from drainage water?

• Viruses, bacteria, and pathogens

• Nutrients

• Pesticides

• Minerals

How much less water and fertilizers can be used with UV treatment?

• 10% less

• 40% less

• 20% less

• 30% less

What is the yield difference between open country and greenhouse cultivation?

• Greenhouse yields are 15 times higher

• Greenhouse yields are 20 times higher

• Greenhouse yields are 10 times higher

• Greenhouse yields are 5 times higher

How much water is needed to grow one kilogram of tomatoes in a greenhouse?

• 120 liters

• 60 liters

• 30 liters

• 90 liters

What is the water usage reduction in greenhouses compared to open country cultivation?

• 5 times less

• 10 times less

• 15 times less

• 20 times less