Business Green: The Asian Development Bank (ADB) has announced it is to double its annual spending on clean energy investments in Asia-Pacific to $2bn (£1.2bn). The increase, which forms part of ADB’s Energy Efficiency Initiative, will take effect from 2013. Since last year the bank has budgeted $1bn a year to finance clean energy projects in developing member countries. However, investments in 2008 exceeded the allotted amount, totalling $1.6bn, and now the bank has moved to formally endorse …