There is no economic activity restricted entirely to e east coast of Australia. Common economic activities such as Business and Retail, Mining, Manufacturing, Agriculture and Tourism are all carried out along the eastern, southern, western and northern coasts of Australia.
Geologists use a variety of techniques to establish absolute age, including radiometric dating, tree rings, ice cores, and annual sedimentary deposits called varves.
If there is less rainfall than in agriculture or river scarcity of water is increase and If hotter weather than we need more water to drink or other purpose and we fell to hot