Determining the weight of 100 CDs depends on whether only the CDs are weighed or if the CDs have sleeves or jewel cases. A single CD by itself weighs about 0.58 ounces. Therefore, 100 CDs by themselves weigh 58 ounces.
Plants and animals need nitrogen in order to make proteins. Proteins are essential compounds for healthy growth and fully functioning organisms. However, nitrogen is often in short supply to plants in both natural and agricultural systems. If nitrogen supply limits the growth of plants then the animals which feed on the plants will also suffer.
All animals need oxygen from the air to use the energy that is in the food they eat. Plants need carbon dioxide in order to make food. Water vapor makes clouds and therefore rain, possible. Nitrogen from the air is used by bacteria on plant roots. The bacteria change nitrogen into materials that plants use to grow.