Wirth Michael I – Insider Transactions

Ticker	Owner	Relationship	Date	Transaction	Cost	#Shares	Value ($)	#Shares Total	SEC Form 4
NTR	Wirth Michael I	other: Former CFO	Feb 27 '07	Sale	3.25	33,990	110,475	0	Feb 28 12:00 AM
NTR	Wirth Michael I	other: Former CFO	Feb 14 '07	Sale	3.32	25,000	82,998	50,530	Feb 15 12:00 AM
NTR	Wirth Michael I	CFO, Exec. VP, Sec. & Treas./	Mar 22 '06	Buy	4.47	1,000	4,470	75,530	May 16 12:00 AM
NTR	Wirth Michael I	CFO, Exec. VP, Sec. & Treas.	Jun 24 '04	Buy	8.75	100	875	100	Jun 25 12:00 AM

Insider Trading & Congressional Trades