雅思大作文范文：化肥问题

环境问题：

1. Food can be produced much more cheaply today because of improved fertilisers and

better machinery. However, some of the methods used to do this may be dangerous to human health and may have negative effects on local communities. To what extent do you agree or disagree?

[Sample]:

Fertilisers and machinery used to be welcomed by countries worldwide as essential elements of industrialised farming, a landmark in the history of global agriculture. However, because of being used on a large scale worldwide, they have caused heated controversy. There is an ongoing debate on the possible damages of industrial farming caused to the environment and humanity. In my opinion, both are still irreplaceable, although efficient and scientific utilisation is highly recommended.

Fertilisers and machinery are both essential in increasing crop yields, a solution to starvation throughout the world. In history, manual work accounted for the majority of farming, from sowing, irrigating to harvesting. The slow pace of human labour made it impossible to produce enough crops to feed populations. Farming is, on the other hand, exposed to the influence of many elements –weather conditions, soil compositions, pests or some unpredictable events like natural disasters. Fertilisers enhance crops or other foods’resistance to external disturbances, while machinery saves manpower by finishing the major part of the work. The yield is raised to the highest, and lands are used to the full. Enough food can be produced to meet/satisfy the market need now, despite the continued growth of the population.

Some people defy fertilisers and machinery because of their concern on environment. However, this notion has been challenged by advances in this area of knowledge. Technological innovation has made machinery more environmentally-friendly, and many machines used for farming purposes are now able to operate without generating much waste. Fertilisers, by comparison, are much less environment-damaging. Most fertilisers are organic and free of ingredients incompatible with the environment. Nor do they have deleterious effects on people’s health.

Despite what has been discussed, farmers should beware of over-application of fertilisers. From an environmental perspective,fertilisers and machinery should be classified and used with caution. The over—application of fertilisers not only has perpetually disastrous effects on farms but also injures the neighboring ecosystem. Many scientific studies suggest that a long history of fertilisers use can significantly reduce land fertility. Other consequences include poisoning all wildlife feeding on farm crops, like birds, and polluting the neighboring water bodies. On healthy and safety grounds, fertilisers might bring remediless damage to eaters’ health, for some chemicals, although not fatal themselves, might become life-threatening when accumulating inside eaters’ bodies.

On the basis of the above-mentioned arguments, people are convinced that the sustainable supply of foods still rests/lies on fertilisers and machinery, and the key is to use them properly and in moderation.