<i>How is a handful of people eschewing flights and 5-day work weeks going to have any impact on our future temperatures?</i><p>We can work on renewables, but the main source our renewable power today is hydroelectric and I have read that very little growth in hydroelectric power can be expected because the vast majority of exploitable topology in the USA is already in use for hydroelectric.<p>Its hard to imagine enough wind turbines being built to eliminate oil, coal, and gas very soon. I've probably made a mistake in my calculations so I welcome some help here. Maybe someone can correct this if I'm wrong.<p><pre><code> total_usa_power_MWH = 3,808,000,000
fraction_non_renewable = 0.78
replacement_needed_MWH = total_usa_power_MWH * fraction_non_renewable
// replacement_needed_MWH == 2,970,240,000
turbine_capacity_factor = 0.32
nameplate_needed_MWH = replacement_needed_MWH / turbine_capacity_factor
// nameplate_needed_MWH = 9,282,000,000
cost_per_nameplate_MWH = 2,000,000
total_cost = nameplate_needed_MWH * cost_per_nameplate_MWH
// total_cost == 1.86e+16
cost_trillions = 18,600
</code></pre>
The annual GDP of the USA is around 20 trillion dollars while replacing our non_renewable_power will cost 900 years worth of our total GDP. Is this right?<p>Even if we pursue this course of action will it affect global temperatures. Other countries will continue to emit GHGs.