* Global warming is defined by the American Heritage Dictionary of Science as "an increase in the average temperature of the Earth's atmosphere," either by "human industry and agriculture" or by natural causes like the Earth has "experienced numerous" times "through its history."
An unbiased and informed discussion of many of the more contentious features of wind power and wind farms. There are some real problems with wind turbines and there are a number of alleged problems that are unfairly used by opponents of wind power to discredit the technology.
Zinc is a chemical element with symbol Zn and atomic number 30. It is the first element in group 12 of the periodic table.In some respects zinc is chemically similar to magnesium: both elements exhibit only one normal oxidation state (+2), and the Zn 2+ and Mg 2+ ions are of similar size.