Environmental Challenges and Solutions

The video discusses the characteristics of different deserts, focusing on sand types in Inner Mongolia's Tengger and Kubuqi Deserts. It highlights global food security challenges due to desertification and water scarcity, emphasizing Taiwan's environmental changes over 20 years. The impact of soil salinization on agriculture is examined, with a focus on salt concentration and plant growth. Reforestation efforts to combat soil erosion and protect coastal areas are described, along with the importance of tree planting. Finally, the video addresses land use changes and biodiversity loss in Taiwan, linking these issues to agricultural land reduction and environmental impact.

What is a distinguishing feature of the sand in the Tengger Desert compared to other deserts?

• It is red and very fine.

• It is coarser and grayish-white.

• It is finer and more yellow.

• It is black and coarse.

What percentage of Taiwan's food supply is imported?

• 30%

• 90%

• 70%

• 50%

What environmental change has been observed in Taiwan over the past 20 years?

• Decreased rainfall

• Expansion of sand dunes

• Increased forest cover

• Increased desertification

What is the main cause of soil salinization in Taiwan?

• Deforestation

• Overuse of fertilizers

• Excessive rainfall

• Sea water intrusion

What is one method used to combat soil salinization in Taiwan?

• Using chemical pesticides

• Planting salt-tolerant trees

• Increasing irrigation

• Building concrete barriers

What is the impact of soil salinization on plant growth?

• It enhances plant growth.

• It has no effect on plants.

• It only affects aquatic plants.

• It hinders plant growth.

What is the role of beneficial bacteria in soil management?

• They increase soil salinity.

• They reduce soil temperature.

• They help decompose organic matter.

• They increase soil acidity.

How much arable land did Taiwan lose between 2005 and 2020?

• 43 thousand hectares

• 2.1 million hectares

• 4.3 thousand hectares

• 4.3 million hectares

What is a significant threat to global food security mentioned in the video?

• Increased urbanization

• Land degradation and desertification

• Rising sea levels

• Deforestation

What is a consequence of land degradation in Taiwan?

• Improved water quality

• Expansion of agricultural land

• Increased biodiversity

• Reduction of arable land