I like your attitudes, I'll just stick my head in the sand like an ostrich....
There is no infrastructure to replace fossil fuels. Farming and Fishing depend on Fuel to drive engines that harvest crops and fish. The US hit peak production of oil in the early 70's. Today they use fracking (injecting water and/or steam) to reclaim used up wells. The environmental impact of this not really observable, but it can not be good. IN every place they have drilled for fracking, there have been minor earthquakes, the land underneath changing. Since the 1930 to wade off drought, farmers in the southern US have been drilling wells deeper and deeper to get water. Calculate fracking in the mix, the situation will only get worse.
The world estimated peak supply of oil is supposed to happen in the 2020's, not that far around the corner. When farmers can't get their crops out of the fields because the machinery can't run, then the millions in the city will start to starve....
The farm machinery runs off fossil fuels, with it in short supply, food from the fields won't come in.
I recently watched a documentary on the war in the middle east... The thing was, the side losing always set the oil fields on fire....
You can always go back and doing everything on a farm by hand, which takes too much manpower. But you also need water. Look at how many wells depend on a pump to deliver the water. Whether it is run by electricity or diesel engine, a portable generator usually runs on fossil fuels.