Launch HN: Wren (YC S19) – Offset Your Carbon Footprint

"How about instead of directing people to pay a middle man to take 20% off the top to pay others to plant trees" which, correct me if I'm wrong, is exactly what you are doing, while some of may be going to non-tree planting activities - the most effective thing you can do with that money right now, unless you are sitting on a miraculous new technology, is to pay people to actively plant new trees and/or protect existing forest.

Per your website for those that haven't looked

>Wren takes 20% of each subscription and puts it toward growing the company.

Also like I told Paul, and Sam Altman,

"Planting trees isn't even a bandaid, it's like cutting your arm off and then gently blowing in the gaping wound. To offset our current CO2 production you need to add more than 31 million square miles, nearly 16% of the earth's land, of new forest assuming a healthy density of 40-60 trees per acre."

That figure above is actually really conservative. Add to that the fact we're losing forest at an estimated 28,125 square miles annually... do you realize how many customers you'll have to get to even combat 28,125 square miles annually? The best trees can manage about 48lbs of CO2 per year, and healthy forest is 40-60 trees per acre, that means you're going to need to plant a billion plus trees a year to even hope to combat current forest loss, a BILLION trees... and I'm not talking twigs, I'm talking 10ft+ trees, in healthy soil, with healthy fungal networks (the fungi that work in symbiosis with trees aid considerably in the carbon sequestration and overall tree health).

Seriously, do the math yourselves and then try and justify your business model. Not to me, but to each other.

I think you need to cease operations immediately, I think you need to do a lot more math, and then I think you need to come back with a strategy to help people personally minimize their carbon impact. You're selling people a fantasy, you're selling them nothing more than an uniformed "I'm helping save the world" feeling because they joined a subscription service while you take 20% off the top to hire more employees.

I honestly have no idea whatsoever why YC selected your company and chose to fund it, other than the 20% off the top of every subscription and perhaps banking on the fact that people will feel guilty about climate change and happily fork over money on a subscription model.

Monoculture ecosystems are fairly easy to avoid, you just have to plant different types of trees that will thrive. This is easy for the Community Tree Planting project on our site because the farmers are the ones planting the trees and they usually want to incorporate agroforestry techniques as part of their farm, so it's a fairly diverse ecosystem already—they aren't just going out and planting 100s of pine trees.

There's a few strategies to ensure wood isn't harvested. The first one is by making the trees valuable in the ground to farmers—focusing on fruit and nut trees that the farmers benefit from day to day.

Next reason is simple: they're paid to keep them in the ground.

The next is that there's social pressure. These farmers plant trees with a group of other farmers, and if anyone cuts down their trees the whole group loses some of the benefits.

It's a promising model which is why we like this partner.

People who sign up for Wren usually were not previously considering offsetting their carbon footprint. In 1 month ~200 people have offset their footprint through Wren. We anticipate this number to grow exponentially, and think several million people offsetting their carbon footprint is a reasonable goal for the short term. This is nontrivial—it will be as impactful as the U.S. agreeing to go on track for the paris climate accord again. This would not happen if we did not take a fee.

Planting trees is one of many solutions we're focused on. Project Drawdown has 99 more: https://www.drawdown.org/ and if we were able to enact all of them we'd be carbon neutral as a planet.

We will certainly be doing more math and developing a better strategy. However we think that by launching Wren we have already learned more than months spent strategizing could have taught us—this is at its core a consumer behavior problem so we have to spend our time understanding people.

Keep us posted on more ideas and feedback for maximizing our impact

Another part of me wonders why would anyone chose Wren over COTAP[0] (for example) - a non-profit (501c3) where 90.9% of funds go toward their projects, you get a tax deduction and you can check in on their finances via their non-profit filings to ensure they are actually allocating funds how they say they are.

[0] https://cotap.org

edit: grammar