Yasekwa ngo-2004, singumvelisi kunye nomthengisi-mpahla wesixhobo kunye nezincedisi e-China, kunye nezigidi ezingamashumi amathathu zeedola zentengiso ngonyaka kubathengi kumazwe angaphezu kwamashumi amane kunye nemimandla kwihlabathi jikelele.
Sikunika ukhetho olungaphezulu kwe-5,000 yeemveliso ezahlukeneyo ezivela kwizixhobo zombane, izixhobo zegadi, izixhobo zepetroli kunye nezixhobo zesandla, onokuthi udibanise kwi-odolo enye kunye nesitya sokuthumela ngokulula.