Climate change is not only affecting butterflies and polar bears, it's affecting humans, too. For people living in extreme poverty, climate change presents a profound threat to their very survival.

Climate change is changing weather in dramatic ways. We are experiencing floods, droughts and cyclones with intensity and frequency never before recorded in human history.

What does this mean for the world's 1.4 billion people who subsist on a little more than a dollar a day? They are likely hungrier, sicker and poorer because of our changing climate. Families are losing their crops, homes and livelihoods.

The world's poorest are least responsible for causing climate change, yet they are suffering most from its effects. And, with the fewest resources to help them adapt to new conditions, they will pay the highest price. Indeed, they are already.

Heed President Obama's call for immediate action to help the world's poorest people by asking Congress to enact legislation now!