The White House will be applying a “full-court press” on the climate during the United Nations Climate Summit next week. In addition to President Obama’s address to the summit, which will detail all that he is trying to accomplish by executive action, the Cabinet will be unleashed.

The Treasury Secretary will speak to the Brookings Institute about how we can cap carbon and grow the economy. The Environmental Protection Agency will be meeting with corporate executives to win commitments to reduce emissions. The heads of Agriculture, Interior, Transportation and Office of Management and Budget all will be speaking on the importance of averting a climate crisis.

All of this activity is to show the 120 nations attending the summit that the United States has stepped up, and now it’s the rest of the world’s turn.

You can help send that message to the world. All you have to do is attend the Sept. 21 People’s Climate March in New York City.

You won’t be alone. U.N. Secretary-General Ban Ki-moon, former Vice President Al Gore, actor Leonardo DiCaprio, Rep. Keith Ellison (D-Minn.), Sen. Sheldon Whitehouse (D-R.I.) and climate activist Tom Steyer are expected to be there, in addition to organizers like Bill McKibben.

It appears on track to be largest climate march in history, and possibly the most consequential, if it can pressure and inspire the international community to forge a real agreement to collectively cut our greenhouse gas emissions.

The U.N. is our best and last chance for a global solution to the climate crisis. No one country can solve it alone, and President Obama is already doing as much as the leader of one superpower country can do, considering the constraints put on him by the Republican-led House.

The people who need to be pushed will be in New York. And this is the time to push them, as they begin work on an agreement that must be finalized by December 2015, when the United Nations Climate Change Conference meets in Paris.

If you can go, go. Click here to find out how.