Effective environmental protection laws and other measures have led to the improvement of water quality in Tai Hu lake in prefix = st1 /JiangsuProvince. The news was announced by officials from the provincial environmental protection bureau, which has just conducted an inspection of the lake area.  By the end of September, about 80 per cent of industrial pollutants met required standards and the lake is expected to be cleaner by the end of the year, officials said.  According to targets set by the State Environmental Protection Administration, all polluting enterprises must meet set standards by the end of this year or they will be shut down. The Taihu Lake area, which surrounds the cities of Suzhou, Wuxiand Changshou, is one of the most economically developed areas in the country and has long enjoyed a reputation as the "land of fish and rice" However, the quality of water in the lake has been deteriorating at an alarmingly rate in recent years, which has caused concern from the government and local people.  Pollution is so high mainly because people do not have enough environmental awareness and have put economic benefits ahead of their surroundings. Economic development in the area has been rapid with hundreds of factories being built. But officials say most of these do not have the anti-pollution equipment or measures they should have.  Because of the lack of waste treatment facilities, wasted water and other rubbish from residential areas in nearby towns and villages flow into rivers which are connected to TaihuLake. This also contributed to the lake's pollution.  Realizing the seriousness of the situation, the provincial and local governments began to tackle the problem.  Experts were invited to offer suggestions and laws and regulations were issued. All newly built factories and enterprises in the lake area were required to install necessary anti-pollution facilities before they can go into operation. Also, some wasted water treatment works will be built in the three cities. After reading the text, we can learn that  _  .
the economy development will do harm for the environment we can not avoid polluting if we wish to develop our economy. only the experts can deal with the pollution pollution can't be the result of the economy development