Techtalks: Traveltech

As an expert in search engine optimization and copywriting, I can tell you that there are several travel APIs and affiliate programs that provide sustainability information for hotels, ground transportation, and tours and activities. These programs are designed to help travelers make environmentally conscious choices when planning their trips. Here are some of the top travel APIs and affiliate programs that provide sustainability information:

Booking.com: Booking.com has a "Sustainability" filter that allows travelers to search for eco-friendly hotels and accommodations. The site also provides information on each property's sustainability practices, such as energy-efficient lighting, recycling programs, and sustainable food options.

Expedia: Expedia has a "Green Program" that highlights hotels and accommodations that are environmentally friendly. The program includes information on each property's sustainability practices, such as energy-efficient appliances, recycling programs, and sustainable food options.

Viator: Viator offers a range of sustainable tours and activities that support local communities and promote sustainable tourism practices. The site also provides information on each tour's sustainability practices, such as reducing waste, supporting local businesses, and preserving natural resources.

Rentalcars.com: Rentalcars.com offers a range of eco-friendly car rental options that use hybrid or electric vehicles. The site also provides information on each rental company's sustainability practices, such as reducing emissions and promoting sustainable transportation.

By using these travel APIs and affiliate programs, travelers can make informed decisions and support sustainable tourism practices.