Do we need to control population growth? Yes. I'm sticking to one child. I suggest everyone else do the same, but I'm not gonna pass a law charging you buttloads of taxes if you do, like they did in China.
Do we consume too many natural resources? Yes. Our lifestyles need to become more efficient, and they are, just not fast enough. Part of helping this along is shifting part of consumption to nonphysical things, like movies, music, software. Platforms for this are key - iPhone, PSP, etc. That way a product can be created, sold, bought, with little to no waste, and very little energy consumption. The way we create energy is changing and needs to continue to do so - Nuclear pebble-bed reactors are a great way to do this, but it's not enough. We need more wind farms, solar farms, SMALL hydro-electric (tiny environmental footprint, but en masse, can create a lot of eletricity), and INNOVATION. Pumping CO2 undeground is an interesting stopgap, but what we NEED are solutions that don't create it in the first place.
I dont' count corn ethanol among the sustainable or inteligent solutions. It's NOT a solution. Now ethanol made from genetically engineered yeast which consumes waste cellulose and sewage? Totally different idea, and a VERY good one. In fact, it's HAPPENING.
Methane is a far stronger greenhouse gas, and it's created in lakes everywhere, and by dairy farms (and by taco bell!). It can be captured and used as FUEL - there are already dairies here in California that do this, and use that fuel to help power their milkers. Solutions like this are super important.
The population CAN grow a bit more, but it's gonna be tough if it grows at the current rate. The only real solutions here are DRASTIC lifestyle changes, underground megalopoli, and vertical farms....
Vertical Farms are an INCREDIBLE idea and need to be used NOW - this alone could dramatically reduce humanity's carbon footprint by ELIMINATING the shipping of most food, and prevent wasting good fresh water, AND reduce the amount of agracultural runoff, which greatly damages the ocean. If you're unfamiliar with the concept,
have a look.
In conclusion, you can see I'm not a band wagoneer. Solutions like this are REAL solutions, that DO and WILL work. Yes, there will be costs involved, and we're going to be paying, one way or another. Trying to convince yourself that because you don't like how CFLs look, or how Priuses drive, or that Everclear is more expensive now that they're selling Ethanol means that there ARE no real solutions and you don't need to change how you live your life... I think that's a real mistake. Look deeper. This is more than a bandwagon, and the noisy bastards in the movement who have nothing useful to say at all piss me off must as much as they piss you off too.