One part I can add, having tried Ecosia [1] is it at least made me consider question like:
"Are they actually planting these trees?" and "How would I possibly verify?"
"Does Microsoft actually pay them? All I'm doing is clicking? Is that worth enough?"
"How does anybody verify, and how is it not just an optimization for Ecosia to farm clicks for money? Chinese/Indian/Bangladeshi/Nigerian/MechTurk click farms don't cost that much. Seen the prices on MechTurk?"
"Are they actually planting these trees?" and "How would I possibly verify?"
"Does Microsoft actually pay them? All I'm doing is clicking? Is that worth enough?"
"How does anybody verify, and how is it not just an optimization for Ecosia to farm clicks for money? Chinese/Indian/Bangladeshi/Nigerian/MechTurk click farms don't cost that much. Seen the prices on MechTurk?"
[1] https://www.ecosia.org/