Effect of Smoking on Lung Cancer

The research hypothesis on the effect of smoking on lung cancer is stated below: //////Smokers have higher risk of lung cancer than nonsmokers. The independent variable is SMOKING (smoker versus nonsmoker) and LUNG CANCER (lung cancer present versus lung cancer...

Effects Of greenhouse Gases to the Atmosphere

The concentration of carbon dioxide in the atmosphere has increased by about 30% between 1850 and 2000. Over the same time period, the global average surface temperature has increased by about 0.3%. Why are these two percentages different if the global warming has...
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