Citigroup Inc. plans to lend, invest and facilitate deals worth $100 billion by 2025 to support projects that will fight climate change and protect the environment.

Citigroup expects to focus on renewable power, energy efficiency and sustainable transportation opportunities, the New York-based lender said Wednesday in a statement.

The effort builds on an earlier goal to arrange $50 billion in deals that the bank set for itself in 2007 and achieved in 2013, three years ahead of schedule. Citigroup’s new target puts it well ahead of other financial companies, including Bank of America Corp., which said in 2012 it would support $50 billion in deals for low-carbon initiatives, and Goldman Sachs Group Inc., which announced a $40 billion program the same year.

“It sends a strong signal,” to other companies, Val Smith, Citigroup’s director of corporate sustainability, said in an interview. “We have a long history of setting and meeting these goals.”

Citigroup helped arrange financing for the $2.74 billion Solar Star projects in California. SunPower Corp. is building the two solar farms for Warren Buffett’s MidAmerican Energy Holdings Co. They’re expected to have a total of 579 megawatts of capacity when complete this year.

“We need the largest financial players in the world to engage in the climate debate as an economic imperative,” Mindy Lubber, president of the sustainability nonprofit group Ceres, which helped Citigroup develop its strategy, said in an interview.

“I think it’s big enough to make a difference in jumpstarting certain parts of the renewable energy economy and moving green infrastructure forward.”