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CopperBytes Land degradation The productivity of some lands has declined by 50% due to soil erosion and desertification. Yield reduction in Africa due to past soil erosion may range from 2 to 40, with a mean loss of 8.2% for the continent. In South Asia, annual loss in productivity is estimated at 36 million tons of cereal equivalent valued at US$5,400 million by water erosion, and US$1,800 million due to wind erosion. It is estimated that the total annual cost of erosion from agriculture in the USA is about US$44 billion per year, i.e. about US$247 per ha of cropland and pasture. On a global scale the annual loss of 75 billion tons of soil costs the world about US$400 billion per year, or approximately US$70 per person per year. More...

Contribution of the Day Sunscreen SPF or Sun Protection Factor is the time that protected skin would take to burn as compared to an unprotected skin expressed as a number. For example, if a person whose skin burns after 10 minutes exposure to the sun wore a sunscreen with an SPF of 3, it would take him 30 minutes to start to burn. More...

Today's Featured Article High Protein Diets There are many proven benefits of high protein diets. Protein is essential for building muscle, which makes such diets very popular with body builders and gym enthusiasts. A recent article by Askmen.com voted beef jerky as the #1 protein snack on the market. With as much as 13-18 grams of protein per 1 ounce serving, it far outweighs anything else. Unlike carbohydrates, proteins provide long-lasting energy without an insulin surge that accompanies sugary or starchy food intake (which promotes fat storage). More...