Why has sustainable development become a priority for many industrialized countries?(1 point)
1 Sustainable development is essential for countries seeking to improve the standard of living for their citizens.
2 There are positive impacts of sustainable development for increasing mechanization in developing economies.
3 The negative effects of fossil fuels on the environment have become clearer over time.
4 Sustainable development is a cheaper way for countries to industrialize quickly, leading to more efficient factories.