Meaning

3- To test the viability of these two biofuels, David Tilman, an ecologist at the University of Minnesota, calculated the total environmental costs of their production. Tilman and colleagues found out that when all these costs are calculated, ethanol made …

2- But to make these fuels, a lot of petroleum is necessary – to make and operate farm machinery, to produce pesticides and fertilizers, and to process the harvest into fuel. Some people have discussed that the emissions of greenhouse …

2- Dr. Douglas R. Lowy of the National Cancer Institute says that cancer prevention begins at home. A study is producing information associating obesity with a variety of cancers, including breast, colorectal, liver and pancreas. Alcohol is also associated with …

1- Obesity is becoming more fatal than smoking as a cause of cancer. Obesity is associated with about 14 percent of cancer mortality in men and 20 percent in women, compared with 30 percent each for smoking. In some years, …

3- In 40 percent of homes and in more than 50 percent of family cars, children are exposed to tobacco smoke. Less than 50% of the parents/guardians choose to sit in the no-smoking section of restaurants and trains, and less …

4- Tobacco smoke influences the incidence of bronchitis, pneumonia, and asthma. The results show the necessity of more actions to stop smoking in public and other closed places to protect children from the effects of passive smoking. Choose the alternative …

1- A great percentage of families have no limits for children’s exposure to tobacco smoke. A study involving 1,770 parents and guardians in New York and New Jersey finds that in almost 50% of homes and more than 50% of …

2- The researchers tested the quality of food that kids eat in Houston. More than 65 percent exceeded the necessary amount of fat, 75 percent were deficient in calcium, 82 percent were deficient in iron and 85 percent were deficient …