Exhibit 99.1

Computation of ratio of earnings to fixed charges

	First quarter 2013 $ million except ratio
Earnings available for fixed charges:
Pre-tax income from continuing operations before adjustment for income or loss from joint ventures and associated		19,325
Fixed charges		752
Amortization of capitalized interest		57
Distributed income of joint ventures and associates		209
Interest capitalized		(61	)
Preference dividend requirements, gross of tax		(1	)
Non-controlling interest of subsidiaries’ loss (income) not incurring fixed charges		(4	)
Total earnings available for fixed charges		20,277
Fixed charges:
Interest expensed		227
Interest capitalized		61
Rental expense representative of interest		463
Preference dividend requirements, gross of tax		1
Total fixed charges		752
Ratio of earnings to fixed charges		27.0