This paper, Significance of natural resources in the Republic of Croatia is dealing with significant renewable and non renewable energy sources and potential available opportunities to exploit the impact on economic growth and development of countries. The world's population has made the most of their energy needs from non renewable resources such as coal, oil and natural gas that have been described in detail in the negative environmental impacts. Given that attention has been paid to renewed natural resources that would be of greater importance in the energy system. Their advantage is the ability to store the plant safely and steadily when using energy with less environmental impact. Also, the use of wind, water, solar and biomass in Croatia is described, as is the consumption and potential impact on the growth and development of the country. An important part of the work is related to renewable energy resources, where in the future will certainly be the need for an environmentally friendly energy effect in order to reduce the adverse impacts of independent energy sources.