McCain wants Off-shore drilling, nuclear power, alternative energy, and incentives to help solve the energy?

crisis while Obama says no to drilling (at least for now), possible nuclear exploration (originally said no, but flip-flopped), no gas tax relief, and yes to alternative sources. My Question- Libs keep saying that drilling and nuclear power will not give immediate relief and will take at least 7 years to even begin to help, but if we just try to goto an alternative only policy won't that take decades to actually come to be? Isn't a combination of ideas a much better policy than limiting to only one way?