Something that is impervious does not allow fluids to pass through it. Buildings and paved roads don’t allow water to pass throu
gh them. They are called impervious cover. These maps of Connecticut show the percentage of land covered by impervious surfaces such as pavement and buildings. The map on the left shows current conditions, and the map on the right shows predicted future conditions. Which of these statements is true? a. The percentage of impervious cover is expected to shrink in Connecticut.
b. Projections show that the entire state will soon have more than 10% impervious cover.
c. Projections show that the entire state will soon have more than 25% impervious cover.
d. Tidal marshes (wetlands) will be protected from the expansion of impervious cover.
The Columbia River provides more than one-third of all the hydroelectric power in the United States. Hydroelectric power plants located on the river with generating capacity and contributed approx 44% of the total hydroelectric power in the nation. The steep slopes of the Columbia River and its streams make it ideal for the production of hydroelectric power.