Shadows of clouds can be seen along the coastline of the Gulf of Carpentaria in Australia's Northern Territory July 21, 2013. The frontrunner to become Australia’s next prime minister, Tony Abbott, holds ambitious plans to develop the country's sparse and inhospitable north by 2030 to attract a new wave of mining investment and boost agricultural exports to Asia. Picture taken July 21, 2013. REUTERS/David Gray (AUSTRALIA - Tags: ENVIRONMENT BUSINESS POLITICS)