09/21/2013 01:25 pm ET Updated Nov 21, 2013

Time to Draw the Line

Some great things have happened since that
freezing day last February when I marched to the Forward on Climate rally in
Washington, D.C., with 50,000 of my closest friends. Looking back, it did feel
like the start of something big. From the stage, the sight of that sea of faces
on the National Mall was unforgettable. For the first time, activists from all
kinds of backgrounds were standing together to say that we are not just
activists fighting a single pipeline, or waging isolated efforts to combat
fracking, coal, and dirty fuels; we are one climate movement, we are
determined and hopeful and we will act to solve the climate crisis.

With one voice, we challenged the president, the
Congress, and our fellow Americans to stop waiting, stop listening to deniers
and special interests and start working on solutions.

President Obama may not have been in town that
day, but he heard our message. Just a few months later, he delivered the first
national address on climate policy in U.S. history, put his Keystone XL
decision squarely into a climate context and promised to use his executive
authority to act.

Yesterday, he delivered on part of that promise,
with new limits for the nation's single largest source of carbon pollution:
coal-fired power plants. That's an important step forward on climate, and the
president deserves credit for seeing it through.

Our momentum is building. Today Americans are
taking to the streets again (this time in more than 200 cities) to Draw the Line against the Keystone XL pipeline and dirty tar sands. And again,
we have reason to be both determined and hopeful. We're hopeful because, in
California, Colorado, Michigan, Iowa, South Dakota and places all across the
country, solar and wind are being installed at rates cheaper than new coal or
new gas. Why build out fossil fuels when clean energy helps stabilize our
planet, is cheaper and puts more people to work?

Why are we determined? Because the verdict is
already in: Keystone XL would be a climate disaster. The pipeline is the
lynchpin of the oil industry's plans to extract and burn the dirtiest source of
oil on the planet. Every year, it would create carbon pollution equivalent to
37.7 million cars (or 51 coal-fired power plants). If we are serious about
addressing climate disruption, Keystone XL cannot be built.

At the Draw the Line events, the Sierra Club, and our many other partners around the nation will demonstrate the
urgency of rejecting this tar sands pipeline in favor of clean-energy
solutions. Join us! You can find the Draw the Line
events nearest to you here.

Can't make it to an event today? Then send your message directly to the Obama administration.

The worst
time to stop fighting is when you're starting to win.