The number of days in which urban dwellers are exposed to extreme, and possibly deadly heat, has tripled since the 1980s.
Young people who are obese can benefit from weight-loss surgery, too. It's safe, and it can reverse the health risks of being overweight.
Artificial sweeteners can help us cut sugar, but because they make some people feel hungrier, they don't always help with weight loss.
Color-coded labels or warnings that quickly alert shoppers to the nutritional content of foods help consumers make healthier choices.
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