After the American Civil War, public health advocates called on the government to provide more public space-the pool called a "suspended pond" was born. At that time, clean water was clean and people could bathe directly in the river. But with the industrialization process, factories Sewage into the river increased, and the government eventually had to shut down most of the swimming pools. Even the remaining "suspended ponds" were introduced directly from the river in the past and turned to close the gates to introduce pure water from the outside. Based on the above text, what is wrong with the following statement? ['People need more public space is the reason for the "suspended pond".', 'The "suspended pond" was introduced directly into the river when it first appeared.', 'Most "suspended ponds" have been closed due to environmental pollution.', '"suspended pond" is the public bathing area in the river.']