ECOLOGY
ENVIRONMENTAL ISSUES
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
because high phosphorus levels were contributing to a reduction in timber resources
|
|
|
because high phosphorus levels were contributing to the pollution of the Great Lakes
|
|
|
because high phosphorus levels were contributing to soil erosion throughout the Canadian Shield
|
|
|
because high phosphorus levels were contributing to the decline of the Canadian mining industry
|
Detailed explanation-1: -Excessive algal blooms in the 1960s and 1970s were a major driver for the signing of the first Agreement in 1972. In that first Agreement, the Governments of Canada and the U.S. agreed to reduce phosphorus loads to Lake Erie by more than 50 percent (from 29, 000 to 14, 600 metric tons per year).
Detailed explanation-2: -In 2015, the Canadian province of Ontario and the US states of Michigan and Ohio joined the Western Basin of Lake Erie Collaborative Agreement, committing to reduce nutrient levels entering the lake by 40 percent by 2025, compared to 2008 levels.
Detailed explanation-3: -Too much phosphorus can cause increased growth of algae and large aquatic plants, which can result in decreased levels of dissolved oxygen– a process called eutrophication. High levels of phosphorus can also lead to algae blooms that produce algal toxins which can be harmful to human and animal health.
Detailed explanation-4: -Excess phosphorus feeds algae growth that makes waters less attractive for swimming and other aquatic recreation. It degrades the conditions that fish, bugs, wildlife, and desired plants need to thrive. In addition, phosphorus can fuel toxic blue-green algal blooms, which are harmful to people and pets.