The evidence of climate change is there for us all to

  • No School
  • AA 1
  • 128

This preview shows page 123 - 125 out of 128 pages.

The evidence of climate change is there for us all to see: rising sea levels and associated flooding with the loss of homes at low land levels are becoming more frequent. Many countries and island communities are now calling for urgent action to delay, halt or even reverse the process, although if we believe the experts, reversal is impossible. Habitable areas are gradually shrinking, often for some of the poorest groups of people, but there seems to be little obvious action taking place. If the major contributors to climate change will not support the reduction of greenhouse gases, there is little hope for the future. Naturalists have also begun to expose the serious problems arising from discarded plastic waste. Birds and animals can die gruesome deaths through being trapped or caught up in plastic bags or ropes, while the long process required for these plastics to decay means that they remain a threat for many years to come. Worse, there is now beginning to be evidence of sea creatures ingesting smaller globules of disintegrating plastic, which harms them and all the other creatures in their particular food chain. The loss of particular species, both flora and fauna, is cause for regret, but I do not agree that they are the most important environmental problems these days. If climate change and damage from plastic continue, there will be less land and less food for everyone, including plants and animals. 131
Image of page 123
TEST 3, WRITING TASK 1 SAMPLE ANSWER This is an answer written by a candidate who achieved a Band 6.0 score: hydroelectric power station can generate electric power by using the energy of water flowing from high level to low level. It works different functions in day and night. In the daNf time, water in the high-level reservoir go through the intake under the dam which is only open in day time. "Then the water flow into the power station in which there is a generator. The generator is operated b'j a reversible turbines that can transfer the water flowing force to the mechanical force which is the power of the generator. The generated electricity then goes to the national grid through the power lines. On the other hand in the night time, the power station works in a reversed way. It pumps water from the low-level reservoir to high-level reservoir to provide the enough water for da'f time's work. The water is pumped by the same reversible turbines from low-level reservoir. So the power station actually consumes energy at night. &ut that is in order to generate more power in the day time. In a conclusion, a hydroelectric power station can generate power is based on the differce heighth of water level. In day time, it uses the natural water energy. Meanwhile in the night, it transfers the water to create and store the energy for the netf day.
Image of page 124
Image of page 125

You've reached the end of your free preview.

Want to read all 128 pages?

  • Fall '19
  • The Passage, Alexander Henderson

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

Stuck? We have tutors online 24/7 who can help you get unstuck.
A+ icon
Ask Expert Tutors You can ask You can ask You can ask (will expire )
Answers in as fast as 15 minutes