Business Green: China’s booming clean tech market could soon be worth up to $1 trillion (£605bn) annually, according to a new report that credits the government’s support for the sector as central to its recent stratospheric growth. The China Greentech Report 2009, released last week, looked at businesses that could feasibly be launched in the country in areas such as clean energy, construction, transport, water and other industries. The sectors could eventually generate between $500m and $1tn …