https://www.energyresourceinstitute.com/certificates/certificate-of-completion/2021-05-05T16:18:11-07:00https://www.energyresourceinstitute.com/certificates/3160/2023-08-02T12:07:40-07:00https://www.energyresourceinstitute.com/certificates/certificate-all-courses/2023-08-23T18:13:00-07:00