PERSON@1 and PERSON@2 highlight eight major clean technology sectors : solar power , wind power , biofuels , green buildings , personal transportation , the smart grid , mobile applications -LRB- such as portable fuel cells -RRB- , and water filtration .

PERSON@1 and PERSON@2 highlight eight major clean technology areas : solar power , wind power , biofuels , green buildings , personal transportation , the smart grid , mobile applications -LRB- such as portable fuel cells -RRB- , and water filtration .
