It's a start - but access to purchasing the fare cards needs to be as simple as grabbing a beverage at the party store. If we have parking lots, that's fine but they really are not green and capture a lot of fumes without outputting anything positive in the environment. All parking lots should use solar-powered lighting, trees planted on the roof and around it, plenty of natural light, and have dozens of spots for electric car parking/charging (with a meter like for parking, not those stupid things that you have to join their club and pay a monthly fee for, and then be a member of multiple clubs to park in different lots).
I really like shuttles to get to the nearest bus line, one of the main reasons commuters from outside the city won't use the bus is because it doesn't run to their neighborhood.
Southwest Detroit is under the Ambassador Bridge (air pollution), between several truck and train yards (air pollution from exhaust and dust kicked up), near Zug Island (full of factories), next to the steel mill, near the Rouge Plant, Marathon Refinery, the Waste Water Treatment plant, scrap yards (which leave opportunities for dumping metals that weren't bought), gravel-making pit (which smells like rotten eggs and petroleum), and several other factories and plants that exude air pollution, can and do pollute water, and plenty of noise pollution. It is a highly concentrated area, and residents have to be constantly vigilant in order to prevent violations to the protections the EPA does offer. In order to report an air pollution issue (our neighborhood regularly smells awful from some issue or another), you have to go through a 30 minute phone call with a department in Lansing that is only open during weekday business hours. We also have severe issues with illegal dumping of tires and other trash in vacant lots, for which people have advocated for a better pick-up schedule but it continues to happen. Many people are living in poverty, so they cannot afford to get more fuel-efficient vehicles, and many people have noisy vehicles (noise pollution) which disturb the quiet of the neighborhood. Some of those are by choice (bass systems, hemis, enhanced engines) but they are also due to being unable to properly repair their vehicles (broken exhaust pipes, mufflers, etc.)
If I were to start somewhere with climate change in Detroit, I would start with working with industrial polluters. They have the resources to implement new technology that can reduce emissions and air pollutants. They can power themselves with alternatives to fossil fuels. They can help fund improved public transportation access for workers to use instead of personal vehicles and stop requiring on job descriptions that people have their own transportation.
On a neighborhood level, I think more programs that help make solar and wind powered homes a reality would be useful. I looked into it for my own home and it was prohibitively expensive for my family. Making bus cards available for purchase at every CVS, corner store, and all the places in between would be helpful. It's very hard to start riding public transportation if it's too hard to figure out where to buy a bus card. Many residents have started their own community gardens, plant trees, or otherwise try to contribute to positive green space, but the tree planting effort could really expand. There are too many playgrounds in the city that are fully exposed to the sun that would benefit from tree plantings. Using solar-powered lighting under the viaducts and even for street lights would be great.
In the construction world, having more houses made with sustainably produced materials, and with materials that don't cause ground water pollution would be great too. More than that, recycling buildings is critical - instead of demolishing an old building and replacing it, it would be better to upcycle it and use the materials wherever possible. If it's not able to sustain rebuilding, use it for parts. (I know it's not possible if it's burned to the ground, but there are plenty that aren't but are vacant.)
In terms of mobility, I would say that having something like the Q line or people mover that connects downtown to Dearborn border along Michigan Ave., Fort St., and a connector to W. Vernor would be something I would love to use. Reusing old train lines around the station could be part of a solution.