Nearly 4,000 companies and 170,000 people will descend on Las Vegas next week for CES, the massive consumer electronics show. For many small technology companies, the event is a big opportunity to raise their profile. VOA's Michelle Quinn visits one San Francisco company to learn how they prepare for "the Super Bowl of conferences."
Coal-fired power plants release greenhouse gases into the air, causing pollution and contributing to climate change. But as much as 10 percent of the coal used in power stations could be replaced ... by chicken waste. VOA's Deborah Block has a report.