Entrepreneurship is the practice of starting new organizations or revitalizing mature organizations, particularly new businesses generally in response to ientified opportunities. Entrepreneurship is often a difficult undertaking, as a vast majority of new businesses fail. Entrepreneurial activities are substantially different depending on the type of organization that is being started. Entrepreneurship ranges in scale from solo projects (even involving the entrepreneur only part-time) to major undertakings creating many job opportunities. Many "high-profile" entrepreneurial ventures seek venture capital or angel funding in order to raise capital to build the business. Angel investors generally seek returns of 20-30% and more extensive involvement in the business. Many kinds of organizations now exist to support would-be entrepreneurs, including specialized government agencies, business incubators, science parks, and some NGOs.