Wren
Offset your carbon footprint by saving rainforests
竞品与替代品
Regreener
Measure, reduce and offset your carbon footprint
Greenr
Track, reduce, compete and offset your carbon footprint
Crypto Carbon Footprint Calculator
Calculate & offset emissions from your cryptocurrencies
Trip to Carbon
A carbon footprint calculation API for travel.
CarbEngage
API for company and product carbon footprint data