A lot of the alternative energy sources will end up being cheaper than oil and coal in 20-50 years
Source?
if some of them aren't cheaper already, so what is there to lose going alternative, and the huge possibility of a much bigger loss to come if we don't, obviously coal and oil are going to run out before too long, not to mention their cost to the environment, staying on the old course is clear stupidity with what we know now.
But renewable energy is currently uneconomical and doesn't compete with the fossil-fuel alternative. So, if as you say, renewable energy does become cheaper, then it is at that point that we start to subsidise and incentivise.
But to push it whilst it is, on average, almost triple (now with the scrapped subsidies for onshore wind) the price of the economical alternative, you would have to be a lunatic--unless, of course you're quite happy to push millions of your fellow countrymen into fuel poverty WHILST the Asian giants laugh at our stupidity.
Careful of the slippery slope fallacy. I believe incentives will be offered to those who participate but I cannot see it becoming mandatory unless there is some sort of crisis.
This is true--corporate lobbyists wouldn't allow it. And what do you mean by crisis?
What does it matter? Yes, it probably won't do anything to effect climate change but it makes people feel good about doing something. It provides jobs in solar energy. It gets us closer to energy independence.
It makes people feel good about pushing up bills in an effort to fuel the Green Obsession?
The US government is looking at adaptation now. Climate change is going to happen, not much we can do about preventing that. .
"Climate change is going to happen"
What are you talking about? The Earth warms and cools intermittently and, yes, whilst it's true that if you add CO2 to a constant mixture of gasses heat increases, less than half of the 0.8C temperature increase over the last 250 is down to human activity.
To make the alarmist claim that it's all of fault is damaging and unreasonable. Take the warmer Roman period, cool Dark Ages, warmer Medieval period, colder pre-modern period and, finally the now warmer modern period.
And, of course, don't forget Younger Dryas phenomenon in where, 13,000 years ago, a sudden drop in temperature of around 15C over a couple of decades.