PepsiCo, largely known for junk-food brands such as Doritos and Pepsi, is setting out to triple its sales of healthier fare in the next decade. The Associated Press reports that PepsiCo Inc. unveiled the new goal for brands such as Tropicana, Dole, Quaker and Tazo teas on Monday at an investor event. The company also backed its forecast for long-term earnings growth. Governments around the world are exerting pressure on food makers to improve nutrition. But Pepsi is also making the case that it''s just as much consumer demand that''s driving the changes. PepsiCo expects more shoppers to buy based on nutrition as Baby Boomers age and people in developing countries get wealthier. Currently, about 18 percent of PepsiCo''s revenue comes from the lines it considers healthier, including Tropicana, Dole, Quaker and Tazo teas. Nooyi wants to triple $10 billion in revenue from such brands to $30 billion by 2020.