Climate change is making Phoenix increasingly unsafe for outdoor workers like my dad. We need protections from the heat now ...

First-week orders could undermine progress on clean energy investments, pollute the air and add few benefits to the economy, ...

The Trump administration is also ending federal requirements that push car makers to produce more low-emission models.Start ...

Northern Arizona is famous for its aspen trees, and a multi-decade study looks into how they’re being affected by climate ...