Exhibit 12.1

	Six months ended
	June 30, 2010		2009		2008		2007		2006		2005
Earnings (losses):
Losses before income taxes	(38,703	)	(125,481	)	(103,690	)	(134,196	)	(167,927	)	(203,082	)
Gain on debt restructuring	–		–		(130,698	)	–		–		–
Amortization of capitalized interest (a)	–		–		–		–		–		4,206
Interest capitalized (d)	–		–		(3,636	)	(10,109	)	(5,692	)	(2,793	)
	(38,703	)	(125,481	)	(238,024	)	(144,305	)	(173,619	)	(201,669	)
Fixed Charges:
Amortization of expenses related to indebtedness (b)	7,716		16,667		12,862		11,749		10,246		523
Interest expenses (c)	11,352		29,391		20,174		33,444		39,264		32,362
Interest capitalized (d)			–		3,636		10,109		5,692		2,793
Total Fixed Charges	19,068		46,058		36,672		55,302		55,202		35,678
Earnings (losses), as adjusted	(19,635	)	(79,423	)	(201,352	)	(89,003	)	(118,417	)	(165,991	)
Ratio of earnings to fixed charges	(1	)	(2	)	(3	)	(4	)	(5	)	(6	)

(1)	Earnings as adjusted were inadequate to cover fixed charges by $38.7 million in the six months ended June 30, 2010.
(2)	Earnings as adjusted were inadequate to cover fixed charges by $125.5 million in 2009.
(3)	Earnings as adjusted were inadequate to cover fixed charges by $238.0 million in 2008.
(4)	Earnings as adjusted were inadequate to cover fixed charges by $144.3 million in 2007.
(5)	Earnings as adjusted were inadequate to cover fixed charges by $173.6 million in 2006.
(6)	Earnings as adjusted were inadequate to cover fixed charges by $201.7 million in 2005.

(a)	Includes amortization of deferred financing charges in connection with obtaining long-term bank loans which are comprised mainly of stock-based compensation related to warrants issued to banks.
(b)	Includes amortization of debentures discount, and deferred issuance expenses.
(c)	Includes, mainly, the effective interest of long-term loans based on their terms and the effect of hedge agreements with knock-out and knock-in features and interest expenses in relation to convertible debentures.
(d)	Includes, mainly, the effective capitalized interest of long-term loans based on their terms and the effect of hedge agreements with a knock-out feature, capitalized interest in relation to convertible debentures and deferred financing charges in connection with obtaining long-term bank loans which are comprised mainly of stock-based compensation related to warrants issued to banks.