The picture shows the national weather forecast released by the Central Meteorological Observatory on February 24, 20 13. After reading the map, I finished questions 23-25. 23. The following statement

The picture shows the national weather forecast released by the Central Meteorological Observatory on February 24, 20 13. After reading the map, I finished questions 23-25. 23. The following statement is true ( By changing the ground conditions and affecting the local climate, such as artificial afforestation, building reservoirs and irrigation projects, the local temperature changes can be alleviated. In order to reduce the occurrence of smog, we advocate green travel, such as cycling, which can reduce the emission of greenhouse gases such as carbon dioxide.

Therefore, choose: d.