MADISON - Today is my granddaughter Sylvia's first Earth Day, and my grandson Izzy's fifth. When my grandchildren are older, I'll tell them all about how the late Senator Gaylord Nelson, from Clear Lake, Wisconsin, founded the very first Earth Day in 1970.

This year's Earth Day carries an important weight, one that wouldn't be lost on Senator Nelson. Leaders around the world are signing the Paris Agreement today. It's the most important agreement we've ever reached in the fight for climate action.

But despite the overwhelming scientific consensus, despite its very real and present danger, and despite the will of a clear majority of Americans, congressional Republicans -- including my opponent, Senator Johnson -- refuse to acknowledge that climate change exists. It's time for Republicans to wake up and act. Our children and grandchildren deserve no less.

Will you join me, the League of Conservation Voters, and several Democratic allies to call on congressional Republicans to take immediate climate action?

Wisconsin has a long, proud history of conservation and environmentalism. We're proud of our beautiful lakes, our clean air, and our clean water. We know that our environment doesn't need to be sacrificed to appease out-of-state corporations. We also know that we can create a clean energy economy, one that creates good jobs right here in Wisconsin.

We must honor our legacy of environmental action by investing in our shared future, and that starts by acting to combat climate change. I hope you'll join me in demanding Senator Johnson and congressional Republicans act.

Add your name: Call on congressional Republicans to act on climate change today.

Thank you for taking the time to act this Earth Day.

Russ Feingold