In celebration of the first Unesco-recognised World Metrology Day on May 20, as well as a global emphasis on climate change and sustainability, the National Metrology Institute of South Africa (NMISA) held a World Metrology Day seminar, focused on the theme of ‘measurement science in support of sustainability seminar.’ During the seminar, Department of Trade, Industry and Competition (dtic) chief directorate for green industries Gerhard Fourie discussed the opportunities and challenges the energy transition holds for South Africa.