Presidents Obama and Xi announce they ratified the Paris climate agreement reached last year.
Obama reiterates that climate change is not a partisan issue. And yet ...
The Sandpiper pipeline goes down, leaving both sides to focus attention on Dakota Access.
Why is Google trying to get into the hitchhiking business?
Altamonte Springs, Florida, struggled for years to develop a transit system.
Farmworkers could finally get equal rights for overtime pay.
Nearly 40 people were arrested during non-violent direct actions on Wednesday.
Fighting climate change with prayer alone isn't enough, according to the Pope -- humans also have to act.
Winters are getting more extreme.