Duke Energy Carolinas, a subsidiary of Duke Energy, issued $1 billion in green bonds to finance zero emission projects such as solar and energy storage in North and South Carolina, according to a Nov. 9 press release. The bonds, which mark the company’s first clean energy investment offering, have a weighted average coupon of 3.74 percent between the three-year and 10-year maturities. Duke Energy has committed to reducing emissions by 40 percent by 2030. Over the past decade, the company added about 650 megawatts of built or purchased solar capacity and plans to add another 1.8 gigawatts over the next five years. The transaction comes on the heels of Dominion Energy Inc.’s launch of a green bond offering on Nov. 5 providing $362 million to support 574 megawatts of solar generation.