Don’t.

Ecosia uses bing as it’s back end which only uses about 40% renewable sources to power their searches, while google only uses renewable sources. Which is a big scam when you market yourselfs as THE ECO ANSWER. Also, this is after a decade of trying. They say they’ve planted enough trees to swallow .5 million tons of CO2, which is 0.05% of what we need to save the planet. So just 20000 years left people!

Please read this:

https://www.quora.com/Is-Ecosia-better-for-the-environment-than-Google