Carbon Dioxide (CO2) is the primary greenhouse gas emitted by the transportation sector, accounting for around 23% of global CO2 emissions.

Rail Travel typically has the lowest carbon footprint per passenger-kilometer, followed by bus travel, car travel, and air travel.

Sustainable Aviation refers to the practice of reducing the environmental impact of air travel through various measures such as using more fuel-efficient aircraft, optimizing flight routes, and using sustainable aviation fuels.

Expanding the use of fossil fuels is not a key strategy for promoting sustainable travel, as it would increase greenhouse gas emissions and contribute to climate change.

Carbon Offsetting refers to the practice of compensating for the carbon emissions associated with travel by investing in projects that reduce greenhouse gas emissions elsewhere.

Increased traffic congestion is not a potential benefit of sustainable travel, as it would lead to increased air pollution and greenhouse gas emissions.

The primary objective of the Paris Agreement is to limit global warming to well below 2 degrees Celsius, achieve net-zero greenhouse gas emissions by 2050, and promote sustainable development and climate resilience.

Government support for sustainable travel is not a key challenge in transitioning to sustainable travel, as it can play a crucial role in promoting and facilitating the adoption of sustainable transportation options.

Responsible Tourism refers to the practice of choosing travel destinations based on their environmental and social impact, and minimizing the negative effects of tourism on local communities and ecosystems.

Promoting economic growth is not a key principle of sustainable travel, as it may come at the expense of environmental and social sustainability.

Slow Travel refers to the practice of traveling slowly and immersing oneself in the local culture and environment, often by using non-motorized transportation or public transportation.

Increased pollution is not a potential benefit of sustainable travel for local communities, as it would have negative environmental and health impacts.

Ecotourism refers to the practice of traveling to natural areas in a responsible and sustainable manner, with the aim of minimizing negative impacts on the environment and supporting local communities.

High levels of tourism development is not a key challenge in promoting sustainable travel in developing countries, as it can provide economic benefits and support conservation efforts.

Cultural Tourism refers to the practice of traveling to learn about and engage with different cultures, often through visits to historical sites, museums, and cultural events.