What do Leonardo DiCaprio and Barack Obama have in common? Both pledged Tuesday to help protect the ocean.

Obama announced Tuesday that he plans to make large swaths of the Pacific Ocean off limits to fishing, energy exploration and other activities, and will direct agencies to combat a black market where seafood is sold.

DiCaprio said his foundation will spend $7 million over the next two years on ocean conservation.

[posttv url="http://www.washingtonpost.com/posttv/national/leonardo-dicaprio-makes-ocean-preservation-pledge/2014/06/17/88fe390e-f641-11e3-afdf-f7ffea8c744a_video.html" ]


"This isn't simply an exercise in wildlife conservation," DiCaprio said in Washington on Tuesday. "If we don't do something to save the ocean now, it won't be just the sharks and the dolphins that suffer. It will be our children and our grandchildren."

DiCaprio isn't the only star to focus his charitable efforts on the environment. Protecting the Earth has become a very big cause celebre. (See what we did there?) Here's a look at other stars and their green initiatives.

Gisele Bundchen 

Brazil's top model, Gisele Bundchen, right, and American football star Tom Brady pose for a photograph in southern Brazil on March 14, 2009. (Tadeu Vilani/Agencia RBS via AP)

Let's start with DiCaprio's ex-girlfriend (now married to New England Patriots quarterback Tom Brady).

In addition to being the world's highest-paid supermodel, Bundchen has long been a supporter of environmental causes. She is a global ambassador for the United Nations Environment Programme and founded two companies that donate part of their proceeds to save rainforests. One, Ipanema, sells flip-flops and the other, Sejaa, is an environmentally friendly skincare line. She is also on the board of directors of the Rainforest Alliance. 

Bundchen also launched a cartoon, "Gisele and the Green Team," to teach children about the importance of protecting the environment.

Brad Pitt 

Angelina Jolie, left, and Brad Pitt arrive at the world premiere of "Maleficent" at the El Capitan Theatre in Los Angeles on May 28. (John Shearer/Invision/AP)

Pitt — actor, producer, father of six and Angelina Jolie's partner — is also an architecture buff who founded Make it Right, which builds environmentally friendly homes and buildings for people in need. All of the projects are certified LEED platinum by the U.S. Green Building Council.

The foundation is installing solar panels on a Kansas City school, helping parts of New York City rebuild after Hurricane Sandy and will design and build homes on an Indian reservation in Montana.

Pitt helped build homes in New Orleans after Hurricane Katrina, but the projects have come under fire after some of the wood used to build them started rotting.

Dave Matthews Band 

Dave Matthews, right, performs at Darien Lake on June 11 in Darien, N.Y. (Harry Scull Jr./Buffalo News via AP)

The Dave Matthews Band, required dorm room listening in the late '90s and early 2000s, lately has made their tours green. Their Bama Green Project partners with local farmers to provide food for the band while they're on the road and buys carbon offsets for all of their travel. The band partners with two other charities to put recycling bins at shows and run their buses on biodisel. One of the charities, Reverb, was founded by another of our favorite bands from back in the college days — Guster.

Robert Redford 

Director James Redford, actor/filmmaker Robert Redford  and film subject Dylan Redford attend HBO's New York Premiere of "The Big Picture: Rethinking Dyslexia" on Oct. 25, 2012, in New York City. (Stephen Lovekin/Getty Images for HBO)

Robert Redford has been an environmentalist for decades, and was named a "hero of the environment" by Time magazine in 2007.

Redford has been a trustee of the National Resources Defense Council for years and spent two decades fighting to protect the Grand Staircase-Escalante National Monument, which President Bill Clinton declared a protected site in 1996. He also lobbied for the 1976 Clean Air Act and National Energy Policy Act in 1989.

Redford fought to protect the Arctic National Wildlife Refuge, hosted U.S. and Soviet leaders at a 1989 summit on greenhouse gases and invited more than 30 mayors to Sundance, Utah, to discuss global warming in 2009. He put more than 800 acres of land near Sundance into a land trust to protect it from development.

Lately, Redford has been lobbying President Obama to deny the Keystone XL Pipeline; in April, the administration again delayed a decision.

Katie Zezima is a national political correspondent covering the 2016 presidential election. She previously served as a White House correspondent for The Post.