In the dramatic impacts of tourism in the developed world which has improved, and often provide the necessary example, for developing countries to follow. Tourism obviously has advantage as a contributor to economic development that has other activities might not have. But this is only the one side of the coin. For instance tourism accounts for 7% of total carbon emission through air travel. and tourism also contributes in it in the form of movement of people to destinations through automobiles and other means of transport. Due to overuse of the place in the form of frequent walking by tourists to a place result in degradation of that area like in mountain areas it result into naked peaks. The tourists leave the garbage that causes pollution, in the book among the most visited places of India: Mussoorie and Nainital are studied on different parameters to assess the impacts of tourism on these areas's natural environment, physical environment and carrying capacity.