The Amazon used to be a hedge against climate change. Those days may be over.
The world's greatest forest used to absorb greenhouse gases, but it may now be emitting them. And that could spell disaster for all of us.
Every 30 seconds, a young Latino in the US turns 18. Their votes count more than ever.
The 2020 presidential election could be the first time Latinos are the largest minority group in the electorate. Young Latinos could swing the outcome — if they come out to vote.