Environmental damage: Tourists can damage the environment through littering, pollution, and overuse of resources. For example, tourists may leave trash behind, drive off-road, or use too much water.
Economic exploitation: Tourists can contribute to the exploitation of local communities, particularly in developing countries. For example, tourists may buy souvenirs from street vendors who are paid very little, or stay in hotels that are owned by foreign corporations.
Overcrowding: Too many tourists can put a strain on local infrastructure and resources, leading to congestion, pollution, and crime. For example, too many tourists can clog up roads, beaches, and hiking trails, or put a strain on water supplies.
Conflicts with local communities: Tourists may come into conflict with local communities over land use, access to resources, or cultural differences. For example, tourists may build hotels on land that is traditionally used by local communities, or they may bring diseases that are harmful to local people.