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.
The robotics industry has made impressive advancements in 2017, and that's expected to continue as robots are becoming more sophisticated, doing more complicated tasks and spreading almost everywhere. Faiza Elmasry has the story. Faith Lapidus narrates.