At the Earth's surface, earthquakes manifest themselves by shaking and displacing or disrupting the ground. Carbon dioxide extinguishes fire mainly by displacing oxygen. In some habitats it forms dense colonies displacing native plants and modifying existing communities. Refugees have been displacing the indigenous people of the Chittagong Hill Tracts. This phenomenon was seemingly related to increasing mechanization displacing child labor. The project was controversial for displacing over 40,000 indigenous people from the area. Europeans came and settled in Australia, displacing Indigenous Australians. This occurred after the peace treaty failed, with the resultant fighting displacing thousands. This occurred after a peace treaty failed, with the resultant fighting displacing thousands. They continued their expansion south while in turn displacing defeated Hyborians to the south. They moved west, displacing other Indian tribes and becoming feared warriors. Gandhian economy increases employment opportunities; it should not be labour displacing. This packing is steadily displacing the classic soft-pack. This had the effect of displacing the workers. However, neither completed ship reached this weight, displacing and , respectively.