Hydropower accounts for nearly 30% of utility-scale renewable energy in the U.S., but federal hurdles may prevent older hydroelectric plants from staying online and new projects from getting off the ground.

Destructive tornadoes have hit states such as Missouri, Illinois, Kentucky and Indiana this season as activity shifts east. Meanwhile, scientists say dry and hot weather in the Great Plains brought on by climate change could be slowing the number of tornadoes there.

The CyberTractor Challenge is a weeklong event for university students to learn about cybersecurity for agricultural equipment. Experts say the threats are evolving and becoming more complex.

Specialty producers exporting to China have been hit just as hard as soybeans and beef. But they often have fewer alternative markets for their crops, worsening the impact of retaliatory tariffs.