A. Miguel de Cervantes wrote Don Quixote.
(In the future you may want to put Q's like this in the 'Spanish' category [or just Google it]. The book Don Quixote is a part of Spanish culture) :)
Answer:
animal wastes and fertilizers
Explanation:
The majority of the nitrates that are polluting the rivers come from the animal wastes and from the fertilizers used in the agriculture. The increased amounts of nitrates in the rivers causes eutrophication. This basically means that the water is becoming over-saturated with nutrients. This leads to the spreading out of the algae. As the algae spread out more and more, they cover the surface part of the water, so large portions of the rivers do not receive sunlight, which kills of the organisms that use photosynthesis. Further, the algae reduce the amount of oxygen in the water, often resulting in dying out of the fishes. It is a chain reaction that leads from one thing to another and the end result is devastating.
Volcanoes can release an amount of matter into the atmosphere. The particles will serve as nuclei to help form the water droplets. Following an eruption is usually a heavy rainfall that will encourage plant growth.
<span>D. provide systematic irrigation.</span><span>
Agriculture Science is the science of crop production and its improvement. In Agriculture Science, scientists focus on research and development on various aspects of crop technology and production.
Crop improvements include:
1. Irrigation Management as a production technique
2. Minimizing the growth of pests
3. Transformation of raw products to end-consumer products
4. Prevention of adverse environmental effects (e.g. waste management and soil degradation)
5. Supply and demand for food in a global basis 6. Crop quantity and quality 7. Study of other fields of agriculture (e.g. soil science) </span>
