Global investment in clean energy reached a record of $243 billion in 2010, a 30% increase on 2009 levels, according to research house Bloomberg New Energy Finance (BNEF).

Clean Energy Investment

2011 will have to be a very strong year to beat 2010. At this stage, the signs are encouraging,” said Michael Liebreich, chief executive of London-based BNEF, citing the likelihood that costs will come down for solar