There are several key barriers to achieving sustainable development, including:

1. Lack of awareness and understanding: One of the main barriers to achieving sustainable development is the lack of awareness and understanding of the importance of sustainability. Many individuals, businesses, and governments are still unaware of the environmental, social, and economic benefits of sustainable development, and may not prioritize it in their decision-making processes.
2. Short-term thinking: Another major barrier is short-term thinking, where individuals and businesses focus on short-term gains rather than long-term sustainability. This can lead to unsustainable practices that have negative environmental and social impacts in the long run.
3. Financial constraints: Sustainable development often requires significant investments in infrastructure, technology, and human capital, which can be expensive. This can be a major barrier for individuals, businesses, and governments, especially in developing countries where resources are limited.
4. Lack of political will: Sustainable development requires political commitment and leadership to prioritize sustainability goals and implement policies and regulations that promote sustainable practices. However, there may be a lack of political will or resistance to change, which can hinder progress towards sustainability.
5. Inadequate governance and institutional frameworks: Weak governance and institutional frameworks can hinder sustainable development by limiting access to information, resources, and opportunities. This can lead to corruption, inequality, and poor environmental management.

To overcome these barriers, there are several strategies that can be implemented, including:

1. Raising awareness and education: Increasing awareness and education about the benefits of sustainable development can help overcome the lack of understanding and awareness barrier.
2. Long-term thinking and planning: Encouraging long-term thinking and planning can help overcome short-term thinking barriers by emphasizing the importance of sustainability in decision-making.
3. Mobilizing financing: Mobilizing financing and providing incentives for sustainable development can help overcome financial barriers.
4. Building political will and leadership: Building political will and leadership can help overcome political resistance to sustainability goals.
5. Strengthening governance and institutional frameworks: Strengthening governance and institutional frameworks can help overcome institutional barriers and promote sustainable development by ensuring accountability, transparency, and participation.

Overall, overcoming barriers to sustainable development requires a coordinated and collaborative effort from all stakeholders, including individuals, businesses, governments, and civil society organizations.