The above graph shows the electronic waste collection and recycling rate by region in 2016 and 2019. ① In both years, Europe showed the highest electronic waste collection and recycling rates. ②The electronic waste collection and recycling rate of Asia in 2019 was lower than in 2016. ③ The Americas ranked third both in 2016 and in 2019, with 17 percent and 9 percent respectively. ④ In both years, the electronic waste collection and recycling rates in Oceania remained under 10 percent. ⑤ Africa had the lowest electronic waste collection and recycling rates in both 2016 and 2019, showing the smallest gap between 2016 and 2019.

Fritz Zwicky, a memorable astrophysicist who coined the term ‘supernova', was born in Varna, Bulgaria to a Swiss father and a Czech mother. At the age of six, he was sent to his grandparents who looked after him for most of his childhood in Switzerland. There, he received an advanced education in mathematics and physics. In 1925, he emigrated to the United States and continued his physics research at California Institute of Technology (Caltech). He developed numerous theories that have had a profound influence on the understanding of our universe in the early 21st century. After being appointed as a professor of astronomy at Caltech in 1942, he developed some of the earliest jet engines and holds more than 50 patents, many in jet propulsion.