The air pollution stems from the tourist transportation and it is considered to be the main negative effects of tourism. The act of traveling by ground transport such as rail, car and air transport increases the air pollution which damages environment. Evidently, large portion of air emissions is actually caused by 60% of air travel which arises when tourists travel from one place to another. Added to this, the transport emissions lead to photochemical pollution and it is an important source for acid rain and global warming. Campervans and car rentals are used by the tourist to experience a place. However, they lead to air pollution. There are some environmentally friendly cars and transport vehicles that are used. These reduce the impacts. However, they only reduce by 20%. It is imperative to reduce the air pollution to more extent. This is not addressed in the current scheme. These can impact the air quality and cause the people to develop respiratory illness. Buckley (2012) presented the data of around 5000 publications on mainstream tourism and sustainability. Categories chosen by his analysis were population, peace, prosperity, pollution and protection. It was observed that in terms of sustainability, the industry has a long way to go. Some areas in which the tourism sector is lacking globally are in the need for regulations, market resources for applying sustainability and environmental restrictions. Especially in the case of developing nations, it was identified that environmental accounting techniques have to be improved more. The pressure on sustainability already exists in the case of developing nations and tourism sector at times ends up putting more pressure on sustainability means. Now as the author highlighted despite there being such extensive literature on sustainability and developments, the truth is that implementing sustainability has been a challenge all along and in terms of developing nations, there are still much to be done to improve sustainability.