英语作文：哪一项发明对生活既有利又有弊?

Air-condition is widely used by people nowadays.It can make people cool when in the hot day.It can create a pleasant surrounding to work,to study,to sleep and so on.Air-condition is a useful invention,It's easy to use just turn on it and then adjust the temperature.But it destroy the environment,it releas lots of carbon dioxide.The weather become more and more warmer.The air-condition also consume large numbers of electricity.