More than 500 companies representing $10 trillion have adopted science-based emissions-reduction targets. These actions aren't just good for the climate – research shows they can be good for bottom lines.

Renewable energy is on the rise across the U.S., and state-level policies are instrumental. Already in 2019, 10 states have passed policies that promote renewable energy development. Here are four recent wins in states emerging as new leaders in clean energy.

This Month in Climate Science summarizes significant new research on climate change. Studies published in April 2019 show that warming is suppressing economic growth in poorer nations, decreasing Emperor penguin populations and more.