Industry to reduce the reliance on fossil fuels such as kerosene and produce greener, renewable fuels to hit net-zero targets set by ICAO. Airlines are also using more fuel efficient planes on a long-haul flight that can be smaller but can fly further. The Local sourcing is important to help the local community and it reduces food miles. Travel companies who source locally will be seen in a positive light from now on.  
Ethical sourcing covers the products that are produced. This is including the whole supply chain and ensuring that workers are  involved has to be treated and paid fairly. 
There is increasing pressure on travel organisations to become environmentally responsible. Most companies now have a sustainability policy or strategy which everyone follows. Tourists are now becoming more environmentally aware and will choose to book with companies that are playing their part of reducing their impact on the environment. Popular destinations such as the Maldives are at great risk from rising sea levels due to the climate change there. They are trying to reduce the risk and by them doing this they are trying to make environmental aircrafts. They are choosing companies that are more environmental friendly then ones that don't.