 Pernick and Wilder define " clean tech " as " any product , service , or process that delivers value using limited or zero non @-@ renewable resources and / or creates significantly less waste than conventional offerings . " They highlight eight major clean technology sectors : solar power , wind power , biofuels , green buildings , personal transportation , the smart grid , mobile applications ( such as portable fuel cells ) , and water filtration . The authors explain how investors , entrepreneurs , and individuals can profit from technological innovation in these areas . Pernick and Wilder identify some specific clean technologies , companies , and regions that are leading the way . 
 Pernick and Wilder define " clean tech " as " any product , service , or process <a href='null_relcl' title='1'><mark>that</mark></a><a href='uninflect' title='2'><mark>delivers</mark></a> value using limited or zero non @-@ renewable resources and / or <a href='uninflect' title='3'><mark>creates</mark></a> significantly less waste than conventional offerings . " They highlight eight major clean technology sectors : solar power , wind power , biofuels , green buildings , personal transportation , the smart grid , mobile applications ( such as portable fuel cells ) , and water filtration . The authors explain how investors , entrepreneurs , and individuals can profit from technological innovation in these areas . Pernick and Wilder identify some specific clean technologies , companies , and regions <a href='null_relcl' title='4'><mark>that</mark></a>are leading the way . 
Pernick and Wilder define " clean tech " as " any product , service , or process deliver value using limited or zero non @-@ renewable resources and / or create significantly less waste than conventional offerings . " They highlight eight major clean technology sectors : solar power , wind power , biofuels , green buildings , personal transportation , the smart grid , mobile applications ( such as portable fuel cells ) , and water filtration . The authors explain how investors , entrepreneurs , and individuals can profit from technological innovation in these areas . Pernick and Wilder identify some specific clean technologies , companies , and regions are leading the way .