46. What is the name of the process by which water is released from a plant’s leaves into the atmosphere?
a) Infiltration
b) Runoff
c) Transpiration
d) Evapotranspiration
47. Which of the following is not a type of ocean pollution?
a) Oil spills
b) Agricultural runoff
c) Plastic waste
d) Thermal pollution
48. Which of the following is not a method of reducing water use in agriculture?
a) Drip irrigation
b) Flood irrigation
c) Crop rotation
d) Conservation tillage
49. What is the name of the process by which water is naturally filtered as it seeps through layers of sand and gravel?
a) Filtration
b) Disinfection
c) Reverse osmosis
d) Aquifer recharge
50. Which of the following is not a factor that contributes to water scarcity?
a) Population growth
b) Climate change
c) Pollution
d) Abundance of water resources
