BIOL 350 Lecture Notes - Lecture 6: Energy Density, Atlantic Cod, Non-Renewable Resource
2 Nov 2016
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Document Summary
Forms from weathering of rocks and other processes. ~10-110 thousand years have been used: agriculture dominated and changed it. Arable land is being reduced: loss of human needs and sustainability. Natural regeneration and recycling from decomposing animals and organisms. We clear clean, healthy land for only one (1) type of crop: rest of the healthy soil cannot be used for other plants. Erosion: top soil, nutrients, and lost are lost from harvest, volume loss, nutrient loss, polluted water systems, loss of biodiversity, salination. Invention of fertilizer to try and combat losses: use of fertilizer has doubled in the last 30 years of 20th century. Asia has 10x increase use of it. Pesticides invented to kill bugs/ insects and protect crops: north america and europe has the highest pesticide use in the world. Irrigation for hydration of crops: expands the reach of agriculture for hard to reach/ dry lands from water, food:
