Explanation

Japan to launch the first wood-based satellite by 2023 to reduce space debris. Japan's Sumitomo Forestry company and Kyoto University aims to launch the world's first wood-based space satellite to combat the problem of space junk

There are nearly 6,000 satellites circling Earth, according to the World Economic Forum (WEF). About 60% of them are defunct (space junk).

Research firm Euroconsult estimates that 990 satellites will be launched every year this decade, which means that by 2028, there could be 15,000 satellites in orbit.