Environmental groups are increasing their attacks on Republican nominee Donald Trump by tying his campaign's support for fossil fuels to race and gender.

The new tack from anti-fossil fuel groups was underscored after Trump announced the 13 members of his policy team on Friday, which environmental activists criticized as overwhelmingly white and not representative of the country's diversity.

Trump delivered a policy speech in Detroit on Monday to define his economic goals for the country and contrast them with those of Democratic rival Hillary Clinton.

Billionaire activist Tom Steyer's group NextGen Climate immediately criticized Trump's ideas as the policies of an all-white, all-male policy team, which offers "nothing 'new' or 'fresh,'" but only looks to protect corporate profits for big polluters.

"The Trump economic agenda — developed by Trump's all-male, all-white economic advisory team — doubles down on dirty fossil fuels and ignores the enormous economic opportunities presented by clean energy," the group said.

Ahead of the speech, Steyer's group launched a Twitter campaign that was even stronger in admonishing Trump's environmental and economic policies.

"Trump's economic advisory team = 13 white men. How could this group possibly represent our country?!" a NextGen tweet reads, featuring a photo of Trump's face in red, with the words "White Men + Fossil Fuel = Trump Economic Policy."

The AFL-CIO labor federation, which is cooperating with Steyer's campaign, posted a video reaction to Trump's economic speech, calling Trump's economic team "100 percent white, 100 percent Wall Street, and 46 percent named Steve." Six of his 13 advisers are named Steve.

The union group said Trump's agenda makes it clear why big business is backing him as the nominee: He will cut taxes for billionaires, eliminate regulations and estate taxes. For two of the three issues Trump laid out in his economic speech, at least "six white men named Steve support that," it said.

"Trump's economy: it works for Steve but not for us," the video response said.

NextGen said climate change will decrease the global economy $44 trillion by the middle of the century, citing Citigroup's reporting. NextGen said for nearly a decade extreme weather has cost taxpayers more than $10 billion.

Many scientists blame the burning of fossil fuels for causing man-made global warming, resulting in sea-level rise, ocean acidification, more droughts and flooding.