基础篇
In my opinion, organic farming is preferable to chemical farming because it has some outstanding advantages. The following are my reasons.
First of all, we should do everything in our power to protect our delicate environment. Organic farming, with no chemical fertilizers, can keep the soil rich. As a result, it's sure that organic farming is good to the environment. With more and more people diagnosed with cancer, we should pay more attention to our food. Organic farming produces food full of minerals and vitamins, which is nutritious. The better food we eat, the less likely we are to develop disease. Lastly, all of us know that food produced in the traditional chemical way tastes bad. However, organic food is more delicious, which helps us have a good appetite.
In a word, I think organic farming is better.

提升篇
In my opinion, organic farming is preferable to chemical farming because of its significant advantages over the latter. Details are as follows.
In the first place, so delicate is the environment that we should do everything in our power to protect it. Intended to keep the soil rich, organic farming, which is free of chemical fertilizers, is undoubtedly friendly to the environment.
With the number of people diagnosed with cancer on the rise, we are supposed to attach more attention to what we eat. Rich in minerals and vitamins, organic food guarantees us the essential nutrition as well as reducing the likelihood of potential serious disease. It is widely known that food produced from chemical farming tastes flavorless while organic farming can definitely secure the natural flavor of the food, thus stimulating our appetite and contributing to our cuisine culture.
In conclusion, with all these factors taken into account, preference should be given to organic farming.

When it comes to the advantages of urban life, what comes into our minds are the well-established transportation system, quality education and health care as well as comfortable living conditions, which are the main attractions of modern city life.
However, as a result of the widespread use of modern vehicles and boosting industry, there are some disadvantages that can't be ignored. For instance, traffic jams have become a big headache for the people driving to and from work. Besides, noises and harmful smoke pose a threat to people's health.
Despite the disadvantages above, I still think it suitable for people to live in the city where there are various cultural events and people can enjoy the convenience of modern life.