Hopper will fund the planting of six million trees this year – at a cost of $1 million – thanks to its decision to offset the emissions impact of all flights and hotels purchased in its app.

The new Hopper Trees initiative covers all bookings made as of January 1, 2020.

For each purchase, Hopper will make a donation to Eden Reforestation Projects to fund the planting of four trees per flight sold and two trees per hotel room sold.

“In a perfect world we’d all stop flying, because it’s contributing about 3% of global emissions. But in reality, what’s happening is air travel is forecasted for a little more than 4% growth,” says Hopper co-founder and CEO Fred Lalonde.