RESQ is currently designing two apps for climate change. We're a small team and we'd love help (we'll be putting our ideas and code on Github) or to see someone build these. I don't know that we'll have the capacity to build them in the time frame required for the contest. We'll be working on them over the next year. If you've got the ability to bust out something in the submission window we wish you luck!! And, ask you to link to us, so we can help share what you build. The basic RESQ ideas are below:

1. Connect RESQers with waste redirection points (restaurants, markets, festivals, conferences, etc) to stop food before it becomes waste. We imagine this'll require using Google Maps (or, whatever) with a reporting feature that connects [event organizers] with RESQers.

2. Connect people seeking Carbon Offsets with away to pay for tree seedlings to go to farmers who donate their excess wood to low income families (we're thinking that OpenCollective is perfect for part of the process). The UI would be for the farmers & low income families to interact as a kind of a classifieds for Carbon Offsets through wood redistribution.

https://callforcode.org/challenge/
$200,000 Grand Prize
$25,000 1st & 2nd Runners Up
$10,000 3rd & 4th Runners Up