1. Donation and sponsorship: Carnegie Foundation accepts donations and sponsorship from individuals, families, enterprises and other charities. These donations can be used to support Carnegie Foundation projects and initiatives.
2. Return on investment: The Carnegie Foundation will invest some donations and sponsorship funds to get returns through investment. These returns can be used to support the operation and projects of the foundation.
3. Charity fundraising activities: Carnegie Foundation can organize charity fundraising activities to support its mission and projects by raising funds from the public. These activities may include charity dinners, fairs, concerts, etc.
4. Government grants: The Carnegie Foundation can sometimes get grants from the government to support specific projects and initiatives.
It should be noted that the Carnegie Foundation is a non-profit organization, and its main goal is to promote the development of social welfare undertakings, not to make profits. Therefore, its income is mainly used to support various charitable projects and initiatives to improve social welfare and community development.