1) Energy conservation - absolutely. And it's being done. But 70 mpg autos? One can wish - but the technology isn't there.Carl Sagan told a plan.
2) Alternative energy? Absolutely. Solar? Sure - to the extent it becomes competitive without preferential subsidy. But advanced nuclear is a much better green and sustainable base-load alternative that's available right now. A program to replace coal-fired power plants with advanced nuclear generating stations over the next couple-3 decades is hands-down the single most effective action we could take.
3) Reforestation? Love it. I'm doing may part keeping 130 acres of woodlands and wetlands, and I've personally planted many 10s of thousand of trees. Tell it to the Chinese, the Indians, the Brazilians, and sub-Saharan Africans, though.
4) Lifting living standards? Not clear how this affects GCC, but sure. If population control is the aim,_urbanization_ is what we really should be promoting - cities are the great population sinks and always have been throughout human history. Move to the city - stop having kids.
Here's a green progressive who really knows the score: