The City of Issaquah’s tree preservation provisions authorizes the approval authority to grant a tree removal permit if removal will provide solar access to buildings incorporating active solar devices, including windows that face south and contain special storage elements to distribute heat energy. City of Issaquah, WA Landscape & Tree Preservation Regulations §§ 18.12.1380(B)(3)(a)(2), 18.12.1385(B)(5), 18.12.141(B)(3).