Two Harmful Effects of Excessive Use of Fertilisers:

1. Soil Degradation:
Excessive use of fertilisers can lead to soil degradation. When fertilisers are applied in large quantities, they can alter the soil structure, decrease soil fertility, and lead to soil acidity or alkalinity. This degradation can result in reduced soil quality, decreased crop yields, and ultimately impact food production. Additionally, the excess nutrients from fertilisers can leach into groundwater, causing contamination and posing risks to human and environmental health.

2. Water Pollution:
Another harmful effect of excessive fertiliser use is water pollution. When fertilisers are applied in excess, the nutrients such as nitrogen and phosphorus can run off into nearby water bodies like rivers, lakes, and oceans. This nutrient runoff can lead to eutrophication, where excessive nutrients promote the growth of algae and aquatic plants. The rapid growth of algae can deplete oxygen levels in the water, causing harm to aquatic life and disrupting ecosystems. Moreover, the presence of excess nutrients in water bodies can also lead to the formation of harmful algal blooms, which can release toxins and pose risks to human health.
In conclusion, the excessive use of fertilisers can have detrimental effects on soil quality, water bodies, and overall environmental health. It is essential to adopt sustainable agricultural practices and regulate the use of fertilisers to mitigate these harmful impacts and ensure long-term environmental sustainability.