Complex sentence: However, the outcome may be that there will be a significant shift to electric cars, then it will be discovered that this is indeed a bad solution, and then it will be far more difficult to get support for more realistic solutions to global warming problems.
Split into simpler sentences: However, the outcome may be that there will be a significant shift to electric cars; then it will be discovered that this is indeed a bad solution. And then it will be far more difficult to get support for more realistic solutions to global warming problems.