Reuters: General Motors Corp said on Friday it aims to convert all waste from more than half of its manufacturing plants around the world by 2010. The struggling No.1 US automaker, which has posted total losses of US$51 billion in the past three calendar years, currently makes about US$1 billion in global revenue by recycling steel scraps. In North America, GM said, it generated US$16 million from sales of recycled cardboard, wood, oil, plastic and other materials. Currently, the …