I really like the website. It has nice design. 

I would try to talk to people at EAG or EAGx and ask for total honesty. I would say that most people might think it's low impact.

I gave it about 15 minutes to come up with some reasons why people might be reluctant to support you: in general EAs don't focus that much on climate change. Out of all the things that you can do for climate change, planting trees doesn't seem to be the most effective thing to do. You can read about it here. Also, there is a bunch of organizations already doing that (and they also roughly plant 1 tree per dollar). 

 

One of the problems with EA is that people are extremely nice and don't want to tell you that either 

1. They don't like your project and/or don't think it's very good
2. They don't think your project is as good as alternatives and they have limited resources.
3. They don't care much about this cause area.

There are more but it's very common to hear this kind of positive feedback but no commitment/further engagement. When people wish you well/luck, this is them being polite/nice  and saying they aren't interested but that sounds too mean. Furthermore, they really do wish you luck as they probably wish most people luck on their projects.

In your case, I expect it to be a mixture of the 3 perhaps, depending on the case. People are being nice to you and don't want to crush your hopes. Furthermore, if in the EA community, few people care, as a top priority, about climate change.

This also commonly happens in the for profit world. Investors/VCs rarely say they are a no. They will usually give some excuse like it not being the right time or they aren't in this space and such. This allows them to keep the door open to invest in the future if you defy their expectations or just not be seen as a dick/someone you don't want to interact with to preserve their reputation or if they change their mind because someone told them the investment is good. 

A good motto to go by when raising funds is "fuck yes or no" meaning if it isn't an enthusiastic yes with clear things they want further for funding or a promise of funding, it's a no.