Conserving the quality of available water is a high priority world-wide. There are many countries whose water supply is reaching
dangerous levels of contamination. For example, the longest river in China, the Yangtze, is less than 5 years from death if nothing changes. The statements below are possible effects on the environment if the Yangtze dies, which one is a positive effect on the environment? A) The loss of biodiversity in the area could permanently damage the ecosystems in area. B) Loss of this river could stress the other water supplies in surrounding areas causing a domino effect. C) The Yangtze empties into the Sea of Shanghai which may lead to serious problems in this important body of water. Eliminate D) Since the pollution in the water is high in organic material it will eventually decompose and make the area more fertile.
The gravitational potential energy of the ball decreases as it rolls down the hill while the gravitational kinetic energy of the ball increases due to its acceleration in velocity.
