Whenever possible, use existing services, apps, solutions that advocate a sustainable approach. In terms of Search Engine, Ecosia or Gexsi could be worth considering for going an "extra" mile.
In terms of carbon footprint, Google uses a mixture of renewable energy and carbon offsetting to be carbon neutral. They have also announced to have eliminated their total carbon legacy and their next global sustainability goal is to operate entirely on 24/7 carbon-free electricity at all their data centres by 2030. Sembcorp is providing a whole energy solution with a focus on locally-sourced renewable power to support Google’s operations in Singapore. The deal includes energy generated from close to 500 public housing flats with rooftop solar installations.
Microsoft, which owns the Bing search engine, has promised to become carbon negative by 2030, and efforts are underway to investigate whether this footprint is now higher or lower.
However, those carbon neutrality goals do not take into account the transmission of data from the datacentres to our devices and therefore we still need to pursue frugality in using our digital devices as shown in above solution "Reduce Digital Footprint".
108 millions trees
number of trees planted by Ecosia, a search engine that plants a tree every 45 searches.(ecosia.org)
Gexsi is a purpose-driven search engine and a certified B Corporation. Revenues generated by search requests are used to support worldwide projects and social innovators dedicated to the 17 UN Sustainable Development Goals.
As an example, they support projects such as reforestation, infrastructures to fight poverty or plastic removal from the oceans.
They are using BING search partnership services.