WASHINGTON (AP) — President Donald Trump signed legislation today that will devote nearly $3 billion a year to conservation projects, outdoor recreation and maintenance of national parks and other public lands following its overwhelming approval by both parties in Congress.

“There hasn’t been anything like this since Teddy Roosevelt, I suspect,” Trump said. Roosevelt, the 26th president, was an avowed environmentalist who created many national parks, forests and monuments that millions of Americans flock to each year.

Supporters say the Great American Outdoors Act is the most significant conservation legislation enacted in nearly half a century. Opponents countered that the money isn’t enough to cover the estimated $20 billion maintenance backlog on federally owned lands.

At a White House bill-signing ceremony, Trump gave Democrats no credit for their role in helping to pass the measure.

The Great American Outdoors Act requires full, permanent funding of the popular Land and Water Conservation Fund and addresses the maintenance backlog facing national parks and public lands. The law would spend about $900 million a year — double current spending — on the conservation fund and another $1.9 billion per year on improvements at national parks, forests, wildlife refuges and range lands.

Trump in the budget proposals he has sent to Congress had previously recommended cutting money allocated to the fund, but reversed course and requested full funding in March.

Interior Secretary David Bernardt said the law will help create more than 100,000 jobs.