The reading and listening material have a debate on opinions about preventing birds from flying into the glass. the writer lists three ways of stopping this issue, which is rebutted by the following lecture.

Firstly, the writer argues that the buildings can put on one-way glasses to prevent birds. However, the speaker cast doubt on it, that although the birds can't see through the glass, the on-way glass will be a mirror for the birds, but birds don't understand mirrors, which they still thought it is safe to fly.

Secondly, the writer claims that buildings can paint color lines on the window glass to avoid birds. While the speaker views the issue from an opposite angle. According to him, the birds will think the blank between the stripes as holes and they will fly straight through, furthermore, if the color stripes were painted too condensed to prevent birds thinking as holes, then the light inside will be very dark.

Finally, the writer states that creating electromagnets will guide birds away from the building. By contrast, in accordance with the lecturer, the writer's claim does not hold the water, birds use the magnetic field only when long distance travelling, when travelling short distance, birds only will use their eyes and the brightness of the light to fly, which make the electromagnets useless.