Francesca Rheannon in Sustainability Investment News say that the book do not ask the most challenging question of all : is " clean growth " an oxymoron ? She say that at a time when some experts say carbon emissions will need to be cut by 80 to 90 % by 2050 , the world may have to accept steady or even decreasing energy production , no matter how clean it is . Rheannon also state that there is little coverage of social issues . For example , nowhere is there mention of how water supply privatization and delivery by multinational corporations could affect the poor people of the world .