I think the biggest challenge facing aviation and every other "climate-destroying" industry and activity is that the "tree-huggers" can't see anything other than a "ban it" approach. The eventual solution will undoubtedly have to come from an engineering source, using technology to remove the carbon we have poured into the atmosphere over the last 250 years.
There has been some very promising progress on possible techniques in Canada recently, and Cambridge University have set up a dedicated department looking at possibilities, but the activists still think that stopping everything now is a viable position, and that is taking a lot of attention (and resources) away from a realistic approach to the problem.
There will undoubtedly have to be elimination of the worst polluters - burning lignite to produce electricity to charge electric cars makes absolutely no sense at all - but for many human activities the ultimate solution will probably be to find ways to effectively remove the pollution post-event rather than to stop the activity completely.