Translating Uncle Sam

A shadow of a drought

What causes lightning?

What happened to the Everglades?

How to save water

Which household items contain mercury?

Which U.S. cities are most energy-efficient?

Which cars are best and worst for fuel efficiency?

The ups and downs of nuclear power

Which countries produce the most CO2?

Are salmonella outbreaks getting worse?

How much renewable energy do we use?

How do El Niño and La Niña work?