I make $120,000 a year in engineering. I started off at $61,000 a year in 2009 and worked my way up mostly by taking lead on shit projects and high risk projects. There's a lot of change going on right now in basically every branch of engineering and if you have the intelligence and drive, the world is your oyster. It doesn't even need to be green technologies (which is seeing a huge influx anyway), just the rapid pace of technological progress opens up all kinds of interesting possibilities.
The downside is that engineering fucking sucks ass in school. Also, engineering isn't even close to a guaranteed job. For as much talk as there is about a shortage of STEM people, there are quite a few that are still having shitty luck finding an entry level job. There is basically no guaranteed job these days.