ВУЗ:
Составители:
Рубрика:
52
"The decline in the numbers of amphibians worldwide clearly indicates the global
pollution of water and air. Two studies of amphibians in Yosemite National Park in
California confirm my conclusion. In 1915 there were seven species of amphibians in
the park, and there were abundant numbers of each species. However, in 1992 there
were only four species of amphibians observed in the park, and the numbers of each
species were drastically reduced. The decline in Yosemite has been blamed on the
introduction of trout into the park's waters, which began in 1920 (trout are known to eat
amphibian eggs). But the introduction of trout cannot be the real reason for the Yosemite
decline because it does not explain the worldwide decline."
------------------------------
131) The following is a letter to the editor of the Atticus City newspaper.
"Former Mayor Durant owes an apology to the city of Atticus. Both the damage to the
River Bridge, which connects Atticus to Hartley, and the traffic problems we have long
experienced on the bridge were actually caused 20 years ago by Durant. After all, he is
the one who approved the construction of the bridge. If he had approved a wider and
better-designed bridge, on which approximately the same amount of public money
would have been spent, none of the damage or problems would have occurred. Instead,
the River Bridge has deteriorated far more rapidly over the past 20 years than has the
much longer Derby Bridge up the river. Even though the winters have been severe in the
past several years, this is no excuse for the negligence and wastefulness of Durant."
------------------------------
132) The following is a letter to the head of the tourism bureau on the island of Tria.
"Erosion of beach sand along the shores of Tria Island is a serious threat to our island
and our tourist industry. In order to stop the erosion, we should charge people for using
the beaches. Although this solution may annoy a few tourists in the short term, it will
reduce the number of people using the beaches and will raise money for replenishing the
sand. Replenishing the sand, as was done to protect buildings on the nearby island of
Batia, will help protect buildings along our shores, thereby reducing these buildings' risk
Страницы
- « первая
- ‹ предыдущая
- …
- 50
- 51
- 52
- 53
- 54
- …
- следующая ›
- последняя »