Senator Kamala Harris of California and Representative Alexandria Ocasio-Cortez of New York on Monday will unveil legislation aimed at ensuring that climate change plans benefit low-income communities. The congresswomen described the measure as a key element of the Democrats’ Green New Deal.

The effort comes as Ms. Harris, who is running for president, and other Democratic candidates prepare for a set of debates in Detroit this week. Racial and economic disparities on issues ranging from housing to education are expected to take center stage.

Ms. Harris, who has yet to release a comprehensive climate change plan of her own, has focused much of her economic agenda on providing tax credits and other assistance to low- and middle-income Americans. This month, she and Ms. Ocasio-Cortez introduced a bill designed to help people with criminal records obtain housing. […]