A new Earth Day advertisement released by Californians for Population Stabilization tries to place blame on immigrants for California's environmental issues.

In the 30-second ad, a young boy asks many questions like: "If Californians are having fewer children, why is it so crowded? If Californians are having fewer children, why are there so many cars? If Californians are having fewer children, why isn't there enough water? If Californians are having fewer children, where are all the people coming from?" 

CAPS claims that all of California's population growth can be blamed on immigration. They calculated this figure by including children of foreign-born residents. 

"Part of the solution to reversing California's environmental decline, while not politically correct or convenient, is certainly simple," the organization's executive director Jo Wideman said in a press release for the ad, which is airing in San Francisco, Los Angeles and San Diego. "If we slow mass immigration, we can slow population growth and save some California for tomorrow." 

In response, the California Immigrant Policy Center told the Huffington Post that "CAPS is an extremist hate group that isn't rooted in any reality."

"They're basically trying to find any way to spin their anti-immigrant vitriol, so hey, why not choose the environment?" CIPC executive director Reshma Shamasunder told HuffPost. "It's a little bit disingenuous to scapegoat a very specific community," she said.

But researchers are actually saying that immigration to California is actually slowing down. In the 1990s, immigration increased by 37 percent, but in the 2000s it only increased by 15 percent. 

Still, CAPS blames immigration policy for population increases. CAPS says that Congress will allow 1 million more to immigrate to the U.S. this year. 

While opponents of CAPS say immigrants use less carbon emmissions than U.S. natives, CAPS says they use 400 percent more carbon emissions when they get to the U.S. compared to what they used in their native country.

Watch the CAPS video below: